ICD-10 · PDGM grouping
T21 Burn and corrosion of trunk
All 216 codes in the T21 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
216
Can lead a claim
135
Cannot lead a claim
81
What CMS assigns to T21
135 of the 216 codes group to Wound (90) and MMTA - Other (45); 81 are assigned no clinical group. None of the 216 is assigned a comorbidity subgroup. 135 of the 216 can lead a claim. CMS attaches a code-first note to 108 of the 216.
Code first
CMS grouper convention 8, on T21.40XA, T21.40XD, T21.40XS, T21.41XA, T21.41XD, T21.41XS, T21.42XA, T21.42XD, T21.42XS, T21.43XA, T21.43XD, T21.43XS, T21.44XA, T21.44XD, T21.44XS, T21.45XA, T21.45XD, T21.45XS, T21.46XA, T21.46XD, T21.46XS, T21.47XA, T21.47XD, T21.47XS, T21.49XA, T21.49XD, T21.49XS, T21.50XA, T21.50XD, T21.50XS, T21.51XA, T21.51XD, T21.51XS, T21.52XA, T21.52XD, T21.52XS, T21.53XA, T21.53XD, T21.53XS, T21.54XA, T21.54XD, T21.54XS, T21.55XA, T21.55XD, T21.55XS, T21.56XA, T21.56XD, T21.56XS, T21.57XA, T21.57XD, T21.57XS, T21.59XA, T21.59XD, T21.59XS, T21.60XA, T21.60XD, T21.60XS, T21.61XA, T21.61XD, T21.61XS, T21.62XA, T21.62XD, T21.62XS, T21.63XA, T21.63XD, T21.63XS, T21.64XA, T21.64XD, T21.64XS, T21.65XA, T21.65XD, T21.65XS, T21.66XA, T21.66XD, T21.66XS, T21.67XA, T21.67XD, T21.67XS, T21.69XA, T21.69XD, T21.69XS, T21.70XA, T21.70XD, T21.70XS, T21.71XA, T21.71XD, T21.71XS, T21.72XA, T21.72XD, T21.72XS, T21.73XA, T21.73XD, T21.73XS, T21.74XA, T21.74XD, T21.74XS, T21.75XA, T21.75XD, T21.75XS, T21.76XA, T21.76XD, T21.76XS, T21.77XA, T21.77XD, T21.77XS, T21.79XA, T21.79XD, T21.79XS. Code first:
- , if applicable, toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
Every code in T21
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| T21.0 Burn of unspecified degree of trunk | ||||
| T21.00 Burn of unspecified degree of trunk, unspecified site | ||||
| T21.00XA | Burn of unspecified degree of trunk, unspecified site, initial encounterCMS: Burn of unsp degree of trunk, unspecified site, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.00XD | Burn of unspecified degree of trunk, unspecified site, subsequent encounterCMS: Burn of unsp degree of trunk, unspecified site, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.00XS | Burn of unspecified degree of trunk, unspecified site, sequelaCMS: Burn of unsp degree of trunk, unspecified site, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.01 Burn of unspecified degree of chest wall | ||||
| T21.01XA | Burn of unspecified degree of chest wall, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.01XD | Burn of unspecified degree of chest wall, subsequent encounterCMS: Burn of unspecified degree of chest wall, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.01XS | Burn of unspecified degree of chest wall, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.02 Burn of unspecified degree of abdominal wall | ||||
| T21.02XA | Burn of unspecified degree of abdominal wall, initial encounterCMS: Burn of unspecified degree of abdominal wall, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.02XD | Burn of unspecified degree of abdominal wall, subsequent encounterCMS: Burn of unspecified degree of abdominal wall, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.02XS | Burn of unspecified degree of abdominal wall, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.03 Burn of unspecified degree of upper back | ||||
| T21.03XA | Burn of unspecified degree of upper back, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.03XD | Burn of unspecified degree of upper back, subsequent encounterCMS: Burn of unspecified degree of upper back, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.03XS | Burn of unspecified degree of upper back, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.04 Burn of unspecified degree of lower back | ||||
| T21.04XA | Burn of unspecified degree of lower back, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.04XD | Burn of unspecified degree of lower back, subsequent encounterCMS: Burn of unspecified degree of lower back, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.04XS | Burn of unspecified degree of lower back, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.05 Burn of unspecified degree of buttock | ||||
| T21.05XA | Burn of unspecified degree of buttock, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.05XD | Burn of unspecified degree of buttock, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.05XS | Burn of unspecified degree of buttock, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.06 Burn of unspecified degree of male genital region | ||||
| T21.06XA | Burn of unspecified degree of male genital region, initial encounterCMS: Burn of unsp degree of male genital region, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.06XD | Burn of unspecified degree of male genital region, subsequent encounterCMS: Burn of unsp degree of male genital region, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.06XS | Burn of unspecified degree of male genital region, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.07 Burn of unspecified degree of female genital region | ||||
| T21.07XA | Burn of unspecified degree of female genital region, initial encounterCMS: Burn of unsp degree of female genital region, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.07XD | Burn of unspecified degree of female genital region, subsequent encounterCMS: Burn of unsp degree of female genital region, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.07XS | Burn of unspecified degree of female genital region, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.09 Burn of unspecified degree of other site of trunk | ||||
| T21.09XA | Burn of unspecified degree of other site of trunk, initial encounterCMS: Burn of unsp degree of other site of trunk, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.09XD | Burn of unspecified degree of other site of trunk, subsequent encounterCMS: Burn of unsp degree of other site of trunk, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.09XS | Burn of unspecified degree of other site of trunk, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.1 Burn of first degree of trunk | ||||
| T21.10 Burn of first degree of trunk, unspecified site | ||||
| T21.10XA | Burn of first degree of trunk, unspecified site, initial encounterCMS: Burn of first degree of trunk, unspecified site, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.10XD | Burn of first degree of trunk, unspecified site, subsequent encounterCMS: Burn of first degree of trunk, unspecified site, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.10XS | Burn of first degree of trunk, unspecified site, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.11 Burn of first degree of chest wall | ||||
| T21.11XA | Burn of first degree of chest wall, initial encounter | Can lead a claim | A | None |
| T21.11XD | Burn of first degree of chest wall, subsequent encounter | Can lead a claim | A | None |
| T21.11XS | Burn of first degree of chest wall, sequela | Can lead a claim | A | None |
| T21.12 Burn of first degree of abdominal wall | ||||
| T21.12XA | Burn of first degree of abdominal wall, initial encounter | Can lead a claim | A | None |
| T21.12XD | Burn of first degree of abdominal wall, subsequent encounter | Can lead a claim | A | None |
| T21.12XS | Burn of first degree of abdominal wall, sequela | Can lead a claim | A | None |
| T21.13 Burn of first degree of upper back | ||||
| T21.13XA | Burn of first degree of upper back, initial encounter | Can lead a claim | A | None |
| T21.13XD | Burn of first degree of upper back, subsequent encounter | Can lead a claim | A | None |
| T21.13XS | Burn of first degree of upper back, sequela | Can lead a claim | A | None |
| T21.14 Burn of first degree of lower back | ||||
| T21.14XA | Burn of first degree of lower back, initial encounter | Can lead a claim | A | None |
| T21.14XD | Burn of first degree of lower back, subsequent encounter | Can lead a claim | A | None |
| T21.14XS | Burn of first degree of lower back, sequela | Can lead a claim | A | None |
| T21.15 Burn of first degree of buttock | ||||
| T21.15XA | Burn of first degree of buttock, initial encounter | Can lead a claim | A | None |
| T21.15XD | Burn of first degree of buttock, subsequent encounter | Can lead a claim | A | None |
| T21.15XS | Burn of first degree of buttock, sequela | Can lead a claim | A | None |
| T21.16 Burn of first degree of male genital region | ||||
| T21.16XA | Burn of first degree of male genital region, initial encounterCMS: Burn of first degree of male genital region, init encntr | Can lead a claim | A | None |
| T21.16XD | Burn of first degree of male genital region, subsequent encounterCMS: Burn of first degree of male genital region, subs encntr | Can lead a claim | A | None |
| T21.16XS | Burn of first degree of male genital region, sequela | Can lead a claim | A | None |
| T21.17 Burn of first degree of female genital region | ||||
| T21.17XA | Burn of first degree of female genital region, initial encounterCMS: Burn of first degree of female genital region, init encntr | Can lead a claim | A | None |
| T21.17XD | Burn of first degree of female genital region, subsequent encounterCMS: Burn of first degree of female genital region, subs encntr | Can lead a claim | A | None |
| T21.17XS | Burn of first degree of female genital region, sequela | Can lead a claim | A | None |
| T21.19 Burn of first degree of other site of trunk | ||||
| T21.19XA | Burn of first degree of other site of trunk, initial encounterCMS: Burn of first degree of other site of trunk, init encntr | Can lead a claim | A | None |
| T21.19XD | Burn of first degree of other site of trunk, subsequent encounterCMS: Burn of first degree of other site of trunk, subs encntr | Can lead a claim | A | None |
| T21.19XS | Burn of first degree of other site of trunk, sequela | Can lead a claim | A | None |
| T21.2 Burn of second degree of trunk | ||||
| T21.20 Burn of second degree of trunk, unspecified site | ||||
| T21.20XA | Burn of second degree of trunk, unspecified site, initial encounterCMS: Burn of second degree of trunk, unsp site, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.20XD | Burn of second degree of trunk, unspecified site, subsequent encounterCMS: Burn of second degree of trunk, unsp site, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.20XS | Burn of second degree of trunk, unspecified site, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.21 Burn of second degree of chest wall | ||||
| T21.21XA | Burn of second degree of chest wall, initial encounter | Can lead a claim | C | None |
| T21.21XD | Burn of second degree of chest wall, subsequent encounter | Can lead a claim | C | None |
| T21.21XS | Burn of second degree of chest wall, sequela | Can lead a claim | C | None |
| T21.22 Burn of second degree of abdominal wall | ||||
| T21.22XA | Burn of second degree of abdominal wall, initial encounter | Can lead a claim | C | None |
| T21.22XD | Burn of second degree of abdominal wall, subsequent encounterCMS: Burn of second degree of abdominal wall, subs encntr | Can lead a claim | C | None |
| T21.22XS | Burn of second degree of abdominal wall, sequela | Can lead a claim | C | None |
| T21.23 Burn of second degree of upper back | ||||
| T21.23XA | Burn of second degree of upper back, initial encounter | Can lead a claim | C | None |
| T21.23XD | Burn of second degree of upper back, subsequent encounter | Can lead a claim | C | None |
| T21.23XS | Burn of second degree of upper back, sequela | Can lead a claim | C | None |
| T21.24 Burn of second degree of lower back | ||||
| T21.24XA | Burn of second degree of lower back, initial encounter | Can lead a claim | C | None |
| T21.24XD | Burn of second degree of lower back, subsequent encounter | Can lead a claim | C | None |
| T21.24XS | Burn of second degree of lower back, sequela | Can lead a claim | C | None |
| T21.25 Burn of second degree of buttock | ||||
| T21.25XA | Burn of second degree of buttock, initial encounter | Can lead a claim | C | None |
| T21.25XD | Burn of second degree of buttock, subsequent encounter | Can lead a claim | C | None |
| T21.25XS | Burn of second degree of buttock, sequela | Can lead a claim | C | None |
| T21.26 Burn of second degree of male genital region | ||||
| T21.26XA | Burn of second degree of male genital region, initial encounterCMS: Burn of second degree of male genital region, init encntr | Can lead a claim | C | None |
| T21.26XD | Burn of second degree of male genital region, subsequent encounterCMS: Burn of second degree of male genital region, subs encntr | Can lead a claim | C | None |
| T21.26XS | Burn of second degree of male genital region, sequela | Can lead a claim | C | None |
| T21.27 Burn of second degree of female genital region | ||||
| T21.27XA | Burn of second degree of female genital region, initial encounterCMS: Burn of second degree of female genital region, init encntr | Can lead a claim | C | None |
| T21.27XD | Burn of second degree of female genital region, subsequent encounterCMS: Burn of second degree of female genital region, subs encntr | Can lead a claim | C | None |
| T21.27XS | Burn of second degree of female genital region, sequela | Can lead a claim | C | None |
| T21.29 Burn of second degree of other site of trunk | ||||
| T21.29XA | Burn of second degree of other site of trunk, initial encounterCMS: Burn of second degree of other site of trunk, init encntr | Can lead a claim | C | None |
| T21.29XD | Burn of second degree of other site of trunk, subsequent encounterCMS: Burn of second degree of other site of trunk, subs encntr | Can lead a claim | C | None |
| T21.29XS | Burn of second degree of other site of trunk, sequela | Can lead a claim | C | None |
| T21.3 Burn of third degree of trunk | ||||
| T21.30 Burn of third degree of trunk, unspecified site | ||||
| T21.30XA | Burn of third degree of trunk, unspecified site, initial encounterCMS: Burn of third degree of trunk, unspecified site, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.30XD | Burn of third degree of trunk, unspecified site, subsequent encounterCMS: Burn of third degree of trunk, unspecified site, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.30XS | Burn of third degree of trunk, unspecified site, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.31 Burn of third degree of chest wall | ||||
| T21.31XA | Burn of third degree of chest wall, initial encounter | Can lead a claim | C | None |
| T21.31XD | Burn of third degree of chest wall, subsequent encounter | Can lead a claim | C | None |
| T21.31XS | Burn of third degree of chest wall, sequela | Can lead a claim | C | None |
| T21.32 Burn of third degree of abdominal wall | ||||
| T21.32XA | Burn of third degree of abdominal wall, initial encounter | Can lead a claim | C | None |
| T21.32XD | Burn of third degree of abdominal wall, subsequent encounter | Can lead a claim | C | None |
| T21.32XS | Burn of third degree of abdominal wall, sequela | Can lead a claim | C | None |
| T21.33 Burn of third degree of upper back | ||||
| T21.33XA | Burn of third degree of upper back, initial encounter | Can lead a claim | C | None |
| T21.33XD | Burn of third degree of upper back, subsequent encounter | Can lead a claim | C | None |
| T21.33XS | Burn of third degree of upper back, sequela | Can lead a claim | C | None |
| T21.34 Burn of third degree of lower back | ||||
| T21.34XA | Burn of third degree of lower back, initial encounter | Can lead a claim | C | None |
| T21.34XD | Burn of third degree of lower back, subsequent encounter | Can lead a claim | C | None |
| T21.34XS | Burn of third degree of lower back, sequela | Can lead a claim | C | None |
| T21.35 Burn of third degree of buttock | ||||
| T21.35XA | Burn of third degree of buttock, initial encounter | Can lead a claim | C | None |
| T21.35XD | Burn of third degree of buttock, subsequent encounter | Can lead a claim | C | None |
| T21.35XS | Burn of third degree of buttock, sequela | Can lead a claim | C | None |
| T21.36 Burn of third degree of male genital region | ||||
| T21.36XA | Burn of third degree of male genital region, initial encounterCMS: Burn of third degree of male genital region, init encntr | Can lead a claim | C | None |
| T21.36XD | Burn of third degree of male genital region, subsequent encounterCMS: Burn of third degree of male genital region, subs encntr | Can lead a claim | C | None |
| T21.36XS | Burn of third degree of male genital region, sequela | Can lead a claim | C | None |
| T21.37 Burn of third degree of female genital region | ||||
| T21.37XA | Burn of third degree of female genital region, initial encounterCMS: Burn of third degree of female genital region, init encntr | Can lead a claim | C | None |
| T21.37XD | Burn of third degree of female genital region, subsequent encounterCMS: Burn of third degree of female genital region, subs encntr | Can lead a claim | C | None |
| T21.37XS | Burn of third degree of female genital region, sequela | Can lead a claim | C | None |
| T21.39 Burn of third degree of other site of trunk | ||||
| T21.39XA | Burn of third degree of other site of trunk, initial encounterCMS: Burn of third degree of other site of trunk, init encntr | Can lead a claim | C | None |
| T21.39XD | Burn of third degree of other site of trunk, subsequent encounterCMS: Burn of third degree of other site of trunk, subs encntr | Can lead a claim | C | None |
| T21.39XS | Burn of third degree of other site of trunk, sequela | Can lead a claim | C | None |
| T21.4 Corrosion of unspecified degree of trunk | ||||
| T21.40 Corrosion of unspecified degree of trunk, unspecified site | ||||
| T21.40XA | Corrosion of unspecified degree of trunk, unspecified site, initial encounterCMS: Corrosion of unsp degree of trunk, unsp site, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.40XD | Corrosion of unspecified degree of trunk, unspecified site, subsequent encounterCMS: Corrosion of unsp degree of trunk, unsp site, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.40XS | Corrosion of unspecified degree of trunk, unspecified site, sequelaCMS: Corrosion of unsp degree of trunk, unspecified site, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.41 Corrosion of unspecified degree of chest wall | ||||
| T21.41XA | Corrosion of unspecified degree of chest wall, initial encounterCMS: Corrosion of unspecified degree of chest wall, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.41XD | Corrosion of unspecified degree of chest wall, subsequent encounterCMS: Corrosion of unspecified degree of chest wall, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.41XS | Corrosion of unspecified degree of chest wall, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.42 Corrosion of unspecified degree of abdominal wall | ||||
| T21.42XA | Corrosion of unspecified degree of abdominal wall, initial encounterCMS: Corrosion of unsp degree of abdominal wall, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.42XD | Corrosion of unspecified degree of abdominal wall, subsequent encounterCMS: Corrosion of unsp degree of abdominal wall, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.42XS | Corrosion of unspecified degree of abdominal wall, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.43 Corrosion of unspecified degree of upper back | ||||
| T21.43XA | Corrosion of unspecified degree of upper back, initial encounterCMS: Corrosion of unspecified degree of upper back, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.43XD | Corrosion of unspecified degree of upper back, subsequent encounterCMS: Corrosion of unspecified degree of upper back, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.43XS | Corrosion of unspecified degree of upper back, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.44 Corrosion of unspecified degree of lower back | ||||
| T21.44XA | Corrosion of unspecified degree of lower back, initial encounterCMS: Corrosion of unspecified degree of lower back, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.44XD | Corrosion of unspecified degree of lower back, subsequent encounterCMS: Corrosion of unspecified degree of lower back, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.44XS | Corrosion of unspecified degree of lower back, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.45 Corrosion of unspecified degree of buttock | ||||
| T21.45XA | Corrosion of unspecified degree of buttock, initial encounterCMS: Corrosion of unspecified degree of buttock, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.45XD | Corrosion of unspecified degree of buttock, subsequent encounterCMS: Corrosion of unspecified degree of buttock, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.45XS | Corrosion of unspecified degree of buttock, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.46 Corrosion of unspecified degree of male genital region | ||||
| T21.46XA | Corrosion of unspecified degree of male genital region, initial encounterCMS: Corrosion of unsp degree of male genital region, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.46XD | Corrosion of unspecified degree of male genital region, subsequent encounterCMS: Corrosion of unsp degree of male genital region, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.46XS | Corrosion of unspecified degree of male genital region, sequelaCMS: Corrosion of unsp degree of male genital region, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.47 Corrosion of unspecified degree of female genital region | ||||
| T21.47XA | Corrosion of unspecified degree of female genital region, initial encounterCMS: Corrosion of unsp degree of female genital region, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.47XD | Corrosion of unspecified degree of female genital region, subsequent encounterCMS: Corrosion of unsp degree of female genital region, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.47XS | Corrosion of unspecified degree of female genital region, sequelaCMS: Corrosion of unsp degree of female genital region, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.49 Corrosion of unspecified degree of other site of trunk | ||||
| T21.49XA | Corrosion of unspecified degree of other site of trunk, initial encounterCMS: Corrosion of unsp degree of other site of trunk, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.49XD | Corrosion of unspecified degree of other site of trunk, subsequent encounterCMS: Corrosion of unsp degree of other site of trunk, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.49XS | Corrosion of unspecified degree of other site of trunk, sequelaCMS: Corrosion of unsp degree of other site of trunk, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.5 Corrosion of first degree of trunk | ||||
| T21.50 Corrosion of first degree of trunk, unspecified site | ||||
| T21.50XA | Corrosion of first degree of trunk, unspecified site, initial encounterCMS: Corrosion of first degree of trunk, unsp site, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.50XD | Corrosion of first degree of trunk, unspecified site, subsequent encounterCMS: Corrosion of first degree of trunk, unsp site, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.50XS | Corrosion of first degree of trunk, unspecified site, sequelaCMS: Corrosion of first degree of trunk, unsp site, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.51 Corrosion of first degree of chest wall | ||||
| T21.51XA | Corrosion of first degree of chest wall, initial encounter | Can lead a claim, code first applies | A | None |
| T21.51XD | Corrosion of first degree of chest wall, subsequent encounterCMS: Corrosion of first degree of chest wall, subs encntr | Can lead a claim, code first applies | A | None |
| T21.51XS | Corrosion of first degree of chest wall, sequela | Can lead a claim, code first applies | A | None |
| T21.52 Corrosion of first degree of abdominal wall | ||||
| T21.52XA | Corrosion of first degree of abdominal wall, initial encounterCMS: Corrosion of first degree of abdominal wall, init encntr | Can lead a claim, code first applies | A | None |
| T21.52XD | Corrosion of first degree of abdominal wall, subsequent encounterCMS: Corrosion of first degree of abdominal wall, subs encntr | Can lead a claim, code first applies | A | None |
| T21.52XS | Corrosion of first degree of abdominal wall, sequela | Can lead a claim, code first applies | A | None |
| T21.53 Corrosion of first degree of upper back | ||||
| T21.53XA | Corrosion of first degree of upper back, initial encounter | Can lead a claim, code first applies | A | None |
| T21.53XD | Corrosion of first degree of upper back, subsequent encounterCMS: Corrosion of first degree of upper back, subs encntr | Can lead a claim, code first applies | A | None |
| T21.53XS | Corrosion of first degree of upper back, sequela | Can lead a claim, code first applies | A | None |
| T21.54 Corrosion of first degree of lower back | ||||
| T21.54XA | Corrosion of first degree of lower back, initial encounter | Can lead a claim, code first applies | A | None |
| T21.54XD | Corrosion of first degree of lower back, subsequent encounterCMS: Corrosion of first degree of lower back, subs encntr | Can lead a claim, code first applies | A | None |
| T21.54XS | Corrosion of first degree of lower back, sequela | Can lead a claim, code first applies | A | None |
| T21.55 Corrosion of first degree of buttock | ||||
| T21.55XA | Corrosion of first degree of buttock, initial encounter | Can lead a claim, code first applies | A | None |
| T21.55XD | Corrosion of first degree of buttock, subsequent encounter | Can lead a claim, code first applies | A | None |
| T21.55XS | Corrosion of first degree of buttock, sequela | Can lead a claim, code first applies | A | None |
| T21.56 Corrosion of first degree of male genital region | ||||
| T21.56XA | Corrosion of first degree of male genital region, initial encounterCMS: Corrosion of first degree of male genital region, init | Can lead a claim, code first applies | A | None |
| T21.56XD | Corrosion of first degree of male genital region, subsequent encounterCMS: Corrosion of first degree of male genital region, subs | Can lead a claim, code first applies | A | None |
| T21.56XS | Corrosion of first degree of male genital region, sequela | Can lead a claim, code first applies | A | None |
| T21.57 Corrosion of first degree of female genital region | ||||
| T21.57XA | Corrosion of first degree of female genital region, initial encounterCMS: Corrosion of first degree of female genital region, init | Can lead a claim, code first applies | A | None |
| T21.57XD | Corrosion of first degree of female genital region, subsequent encounterCMS: Corrosion of first degree of female genital region, subs | Can lead a claim, code first applies | A | None |
| T21.57XS | Corrosion of first degree of female genital region, sequela | Can lead a claim, code first applies | A | None |
| T21.59 Corrosion of first degree of other site of trunk | ||||
| T21.59XA | Corrosion of first degree of other site of trunk, initial encounterCMS: Corrosion of first degree of oth site of trunk, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.59XD | Corrosion of first degree of other site of trunk, subsequent encounterCMS: Corrosion of first degree of oth site of trunk, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.59XS | Corrosion of first degree of other site of trunk, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.6 Corrosion of second degree of trunk | ||||
| T21.60 Corrosion of second degree of trunk, unspecified site | ||||
| T21.60XA | Corrosion of second degree of trunk, unspecified site, initial encounterCMS: Corrosion of second degree of trunk, unsp site, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.60XD | Corrosion of second degree of trunk, unspecified site, subsequent encounterCMS: Corrosion of second degree of trunk, unsp site, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.60XS | Corrosion of second degree of trunk, unspecified site, sequelaCMS: Corrosion of second degree of trunk, unsp site, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.61 Corrosion of second degree of chest wall | ||||
| T21.61XA | Corrosion of second degree of chest wall, initial encounter | Can lead a claim, code first applies | C | None |
| T21.61XD | Corrosion of second degree of chest wall, subsequent encounterCMS: Corrosion of second degree of chest wall, subs encntr | Can lead a claim, code first applies | C | None |
| T21.61XS | Corrosion of second degree of chest wall, sequela | Can lead a claim, code first applies | C | None |
| T21.62 Corrosion of second degree of abdominal wall | ||||
| T21.62XA | Corrosion of second degree of abdominal wall, initial encounterCMS: Corrosion of second degree of abdominal wall, init encntr | Can lead a claim, code first applies | C | None |
| T21.62XD | Corrosion of second degree of abdominal wall, subsequent encounterCMS: Corrosion of second degree of abdominal wall, subs encntr | Can lead a claim, code first applies | C | None |
| T21.62XS | Corrosion of second degree of abdominal wall, sequela | Can lead a claim, code first applies | C | None |
| T21.63 Corrosion of second degree of upper back | ||||
| T21.63XA | Corrosion of second degree of upper back, initial encounter | Can lead a claim, code first applies | C | None |
| T21.63XD | Corrosion of second degree of upper back, subsequent encounterCMS: Corrosion of second degree of upper back, subs encntr | Can lead a claim, code first applies | C | None |
| T21.63XS | Corrosion of second degree of upper back, sequela | Can lead a claim, code first applies | C | None |
| T21.64 Corrosion of second degree of lower back | ||||
| T21.64XA | Corrosion of second degree of lower back, initial encounter | Can lead a claim, code first applies | C | None |
| T21.64XD | Corrosion of second degree of lower back, subsequent encounterCMS: Corrosion of second degree of lower back, subs encntr | Can lead a claim, code first applies | C | None |
| T21.64XS | Corrosion of second degree of lower back, sequela | Can lead a claim, code first applies | C | None |
| T21.65 Corrosion of second degree of buttock | ||||
| T21.65XA | Corrosion of second degree of buttock, initial encounter | Can lead a claim, code first applies | C | None |
| T21.65XD | Corrosion of second degree of buttock, subsequent encounter | Can lead a claim, code first applies | C | None |
| T21.65XS | Corrosion of second degree of buttock, sequela | Can lead a claim, code first applies | C | None |
| T21.66 Corrosion of second degree of male genital region | ||||
| T21.66XA | Corrosion of second degree of male genital region, initial encounterCMS: Corrosion of second degree of male genital region, init | Can lead a claim, code first applies | C | None |
| T21.66XD | Corrosion of second degree of male genital region, subsequent encounterCMS: Corrosion of second degree of male genital region, subs | Can lead a claim, code first applies | C | None |
| T21.66XS | Corrosion of second degree of male genital region, sequela | Can lead a claim, code first applies | C | None |
| T21.67 Corrosion of second degree of female genital region | ||||
| T21.67XA | Corrosion of second degree of female genital region, initial encounterCMS: Corrosion of second degree of female genital region, init | Can lead a claim, code first applies | C | None |
| T21.67XD | Corrosion of second degree of female genital region, subsequent encounterCMS: Corrosion of second degree of female genital region, subs | Can lead a claim, code first applies | C | None |
| T21.67XS | Corrosion of second degree of female genital region, sequela | Can lead a claim, code first applies | C | None |
| T21.69 Corrosion of second degree of other site of trunk | ||||
| T21.69XA | Corrosion of second degree of other site of trunk, initial encounterCMS: Corrosion of second degree of oth site of trunk, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.69XD | Corrosion of second degree of other site of trunk, subsequent encounterCMS: Corrosion of second degree of oth site of trunk, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.69XS | Corrosion of second degree of other site of trunk, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.7 Corrosion of third degree of trunk | ||||
| T21.70 Corrosion of third degree of trunk, unspecified site | ||||
| T21.70XA | Corrosion of third degree of trunk, unspecified site, initial encounterCMS: Corrosion of third degree of trunk, unsp site, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.70XD | Corrosion of third degree of trunk, unspecified site, subsequent encounterCMS: Corrosion of third degree of trunk, unsp site, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.70XS | Corrosion of third degree of trunk, unspecified site, sequelaCMS: Corrosion of third degree of trunk, unsp site, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.71 Corrosion of third degree of chest wall | ||||
| T21.71XA | Corrosion of third degree of chest wall, initial encounter | Can lead a claim, code first applies | C | None |
| T21.71XD | Corrosion of third degree of chest wall, subsequent encounterCMS: Corrosion of third degree of chest wall, subs encntr | Can lead a claim, code first applies | C | None |
| T21.71XS | Corrosion of third degree of chest wall, sequela | Can lead a claim, code first applies | C | None |
| T21.72 Corrosion of third degree of abdominal wall | ||||
| T21.72XA | Corrosion of third degree of abdominal wall, initial encounterCMS: Corrosion of third degree of abdominal wall, init encntr | Can lead a claim, code first applies | C | None |
| T21.72XD | Corrosion of third degree of abdominal wall, subsequent encounterCMS: Corrosion of third degree of abdominal wall, subs encntr | Can lead a claim, code first applies | C | None |
| T21.72XS | Corrosion of third degree of abdominal wall, sequela | Can lead a claim, code first applies | C | None |
| T21.73 Corrosion of third degree of upper back | ||||
| T21.73XA | Corrosion of third degree of upper back, initial encounter | Can lead a claim, code first applies | C | None |
| T21.73XD | Corrosion of third degree of upper back, subsequent encounterCMS: Corrosion of third degree of upper back, subs encntr | Can lead a claim, code first applies | C | None |
| T21.73XS | Corrosion of third degree of upper back, sequela | Can lead a claim, code first applies | C | None |
| T21.74 Corrosion of third degree of lower back | ||||
| T21.74XA | Corrosion of third degree of lower back, initial encounter | Can lead a claim, code first applies | C | None |
| T21.74XD | Corrosion of third degree of lower back, subsequent encounterCMS: Corrosion of third degree of lower back, subs encntr | Can lead a claim, code first applies | C | None |
| T21.74XS | Corrosion of third degree of lower back, sequela | Can lead a claim, code first applies | C | None |
| T21.75 Corrosion of third degree of buttock | ||||
| T21.75XA | Corrosion of third degree of buttock, initial encounter | Can lead a claim, code first applies | C | None |
| T21.75XD | Corrosion of third degree of buttock, subsequent encounter | Can lead a claim, code first applies | C | None |
| T21.75XS | Corrosion of third degree of buttock, sequela | Can lead a claim, code first applies | C | None |
| T21.76 Corrosion of third degree of male genital region | ||||
| T21.76XA | Corrosion of third degree of male genital region, initial encounterCMS: Corrosion of third degree of male genital region, init | Can lead a claim, code first applies | C | None |
| T21.76XD | Corrosion of third degree of male genital region, subsequent encounterCMS: Corrosion of third degree of male genital region, subs | Can lead a claim, code first applies | C | None |
| T21.76XS | Corrosion of third degree of male genital region, sequela | Can lead a claim, code first applies | C | None |
| T21.77 Corrosion of third degree of female genital region | ||||
| T21.77XA | Corrosion of third degree of female genital region, initial encounterCMS: Corrosion of third degree of female genital region, init | Can lead a claim, code first applies | C | None |
| T21.77XD | Corrosion of third degree of female genital region, subsequent encounterCMS: Corrosion of third degree of female genital region, subs | Can lead a claim, code first applies | C | None |
| T21.77XS | Corrosion of third degree of female genital region, sequela | Can lead a claim, code first applies | C | None |
| T21.79 Corrosion of third degree of other site of trunk | ||||
| T21.79XA | Corrosion of third degree of other site of trunk, initial encounterCMS: Corrosion of third degree of oth site of trunk, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.79XD | Corrosion of third degree of other site of trunk, subsequent encounterCMS: Corrosion of third degree of oth site of trunk, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T21.79XS | Corrosion of third degree of other site of trunk, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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