ICD-10 · PDGM grouping
T33 Superficial frostbite
All 111 codes in the T33 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
111
Can lead a claim
78
Cannot lead a claim
33
What CMS assigns to T33
78 of the 111 codes group to MMTA - Other; 33 are assigned no clinical group. None of the 111 is assigned a comorbidity subgroup. 78 of the 111 can lead a claim.
Every code in T33
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 |
|---|---|---|---|---|
| T33.0 Superficial frostbite of head | ||||
| T33.01 Superficial frostbite of ear | ||||
| T33.011 Superficial frostbite of right ear | ||||
| T33.011A | Superficial frostbite of right ear, initial encounter | Can lead a claim | A | None |
| T33.011D | Superficial frostbite of right ear, subsequent encounter | Can lead a claim | A | None |
| T33.011S | Superficial frostbite of right ear, sequela | Can lead a claim | A | None |
| T33.012 Superficial frostbite of left ear | ||||
| T33.012A | Superficial frostbite of left ear, initial encounter | Can lead a claim | A | None |
| T33.012D | Superficial frostbite of left ear, subsequent encounter | Can lead a claim | A | None |
| T33.012S | Superficial frostbite of left ear, sequela | Can lead a claim | A | None |
| T33.019 Superficial frostbite of unspecified ear | ||||
| T33.019A | Superficial frostbite of unspecified ear, initial encounter | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.019D | Superficial frostbite of unspecified ear, subsequent encounterCMS: Superficial frostbite of unspecified ear, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.019S | Superficial frostbite of unspecified ear, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.02 Superficial frostbite of nose | ||||
| T33.02XA | Superficial frostbite of nose, initial encounter | Can lead a claim | A | None |
| T33.02XD | Superficial frostbite of nose, subsequent encounter | Can lead a claim | A | None |
| T33.02XS | Superficial frostbite of nose, sequela | Can lead a claim | A | None |
| T33.09 Superficial frostbite of other part of head | ||||
| T33.09XA | Superficial frostbite of other part of head, initial encounterCMS: Superficial frostbite of other part of head, init encntr | Can lead a claim | A | None |
| T33.09XD | Superficial frostbite of other part of head, subsequent encounterCMS: Superficial frostbite of other part of head, subs encntr | Can lead a claim | A | None |
| T33.09XS | Superficial frostbite of other part of head, sequela | Can lead a claim | A | None |
| T33.1 Superficial frostbite of neck | ||||
| T33.1XXA | Superficial frostbite of neck, initial encounter | Can lead a claim | A | None |
| T33.1XXD | Superficial frostbite of neck, subsequent encounter | Can lead a claim | A | None |
| T33.1XXS | Superficial frostbite of neck, sequela | Can lead a claim | A | None |
| T33.2 Superficial frostbite of thorax | ||||
| T33.2XXA | Superficial frostbite of thorax, initial encounter | Can lead a claim | A | None |
| T33.2XXD | Superficial frostbite of thorax, subsequent encounter | Can lead a claim | A | None |
| T33.2XXS | Superficial frostbite of thorax, sequela | Can lead a claim | A | None |
| T33.3 Superficial frostbite of abdominal wall, lower back and pelvis | ||||
| T33.3XXA | Superficial frostbite of abdominal wall, lower back and pelvis, initial encounterCMS: Superfic frostbite of abd wall, lower back and pelvis, init | Can lead a claim | A | None |
| T33.3XXD | Superficial frostbite of abdominal wall, lower back and pelvis, subsequent encounterCMS: Superfic frostbite of abd wall, lower back and pelvis, subs | Can lead a claim | A | None |
| T33.3XXS | Superficial frostbite of abdominal wall, lower back and pelvis, sequelaCMS: Superfic frostbite of abd wall, low back and pelvis, sequela | Can lead a claim | A | None |
| T33.4 Superficial frostbite of arm | ||||
| T33.40 Superficial frostbite of unspecified arm | ||||
| T33.40XA | Superficial frostbite of unspecified arm, initial encounter | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.40XD | Superficial frostbite of unspecified arm, subsequent encounterCMS: Superficial frostbite of unspecified arm, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.40XS | Superficial frostbite of unspecified arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.41 Superficial frostbite of right arm | ||||
| T33.41XA | Superficial frostbite of right arm, initial encounter | Can lead a claim | A | None |
| T33.41XD | Superficial frostbite of right arm, subsequent encounter | Can lead a claim | A | None |
| T33.41XS | Superficial frostbite of right arm, sequela | Can lead a claim | A | None |
| T33.42 Superficial frostbite of left arm | ||||
| T33.42XA | Superficial frostbite of left arm, initial encounter | Can lead a claim | A | None |
| T33.42XD | Superficial frostbite of left arm, subsequent encounter | Can lead a claim | A | None |
| T33.42XS | Superficial frostbite of left arm, sequela | Can lead a claim | A | None |
| T33.5 Superficial frostbite of wrist, hand, and fingers | ||||
| T33.51 Superficial frostbite of wrist | ||||
| T33.511 Superficial frostbite of right wrist | ||||
| T33.511A | Superficial frostbite of right wrist, initial encounter | Can lead a claim | A | None |
| T33.511D | Superficial frostbite of right wrist, subsequent encounter | Can lead a claim | A | None |
| T33.511S | Superficial frostbite of right wrist, sequela | Can lead a claim | A | None |
| T33.512 Superficial frostbite of left wrist | ||||
| T33.512A | Superficial frostbite of left wrist, initial encounter | Can lead a claim | A | None |
| T33.512D | Superficial frostbite of left wrist, subsequent encounter | Can lead a claim | A | None |
| T33.512S | Superficial frostbite of left wrist, sequela | Can lead a claim | A | None |
| T33.519 Superficial frostbite of unspecified wrist | ||||
| T33.519A | Superficial frostbite of unspecified wrist, initial encounterCMS: Superficial frostbite of unspecified wrist, init encntr | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.519D | Superficial frostbite of unspecified wrist, subsequent encounterCMS: Superficial frostbite of unspecified wrist, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.519S | Superficial frostbite of unspecified wrist, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.52 Superficial frostbite of hand | ||||
| T33.521 Superficial frostbite of right hand | ||||
| T33.521A | Superficial frostbite of right hand, initial encounter | Can lead a claim | A | None |
| T33.521D | Superficial frostbite of right hand, subsequent encounter | Can lead a claim | A | None |
| T33.521S | Superficial frostbite of right hand, sequela | Can lead a claim | A | None |
| T33.522 Superficial frostbite of left hand | ||||
| T33.522A | Superficial frostbite of left hand, initial encounter | Can lead a claim | A | None |
| T33.522D | Superficial frostbite of left hand, subsequent encounter | Can lead a claim | A | None |
| T33.522S | Superficial frostbite of left hand, sequela | Can lead a claim | A | None |
| T33.529 Superficial frostbite of unspecified hand | ||||
| T33.529A | Superficial frostbite of unspecified hand, initial encounter | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.529D | Superficial frostbite of unspecified hand, subsequent encounterCMS: Superficial frostbite of unspecified hand, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.529S | Superficial frostbite of unspecified hand, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.53 Superficial frostbite of finger(s) | ||||
| T33.531 Superficial frostbite of right finger(s) | ||||
| T33.531A | Superficial frostbite of right finger(s), initial encounter | Can lead a claim | A | None |
| T33.531D | Superficial frostbite of right finger(s), subsequent encounterCMS: Superficial frostbite of right finger(s), subs encntr | Can lead a claim | A | None |
| T33.531S | Superficial frostbite of right finger(s), sequela | Can lead a claim | A | None |
| T33.532 Superficial frostbite of left finger(s) | ||||
| T33.532A | Superficial frostbite of left finger(s), initial encounter | Can lead a claim | A | None |
| T33.532D | Superficial frostbite of left finger(s), subsequent encounterCMS: Superficial frostbite of left finger(s), subs encntr | Can lead a claim | A | None |
| T33.532S | Superficial frostbite of left finger(s), sequela | Can lead a claim | A | None |
| T33.539 Superficial frostbite of unspecified finger(s) | ||||
| T33.539A | Superficial frostbite of unspecified finger(s), initial encounterCMS: Superficial frostbite of unspecified finger(s), init encntr | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.539D | Superficial frostbite of unspecified finger(s), subsequent encounterCMS: Superficial frostbite of unspecified finger(s), subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.539S | Superficial frostbite of unspecified finger(s), sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.6 Superficial frostbite of hip and thigh | ||||
| T33.60 Superficial frostbite of unspecified hip and thigh | ||||
| T33.60XA | Superficial frostbite of unspecified hip and thigh, initial encounterCMS: Superficial frostbite of unsp hip and thigh, init encntr | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.60XD | Superficial frostbite of unspecified hip and thigh, subsequent encounterCMS: Superficial frostbite of unsp hip and thigh, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.60XS | Superficial frostbite of unspecified hip and thigh, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.61 Superficial frostbite of right hip and thigh | ||||
| T33.61XA | Superficial frostbite of right hip and thigh, initial encounterCMS: Superficial frostbite of right hip and thigh, init encntr | Can lead a claim | A | None |
| T33.61XD | Superficial frostbite of right hip and thigh, subsequent encounterCMS: Superficial frostbite of right hip and thigh, subs encntr | Can lead a claim | A | None |
| T33.61XS | Superficial frostbite of right hip and thigh, sequela | Can lead a claim | A | None |
| T33.62 Superficial frostbite of left hip and thigh | ||||
| T33.62XA | Superficial frostbite of left hip and thigh, initial encounterCMS: Superficial frostbite of left hip and thigh, init encntr | Can lead a claim | A | None |
| T33.62XD | Superficial frostbite of left hip and thigh, subsequent encounterCMS: Superficial frostbite of left hip and thigh, subs encntr | Can lead a claim | A | None |
| T33.62XS | Superficial frostbite of left hip and thigh, sequela | Can lead a claim | A | None |
| T33.7 Superficial frostbite of knee and lower leg | ||||
| T33.70 Superficial frostbite of unspecified knee and lower leg | ||||
| T33.70XA | Superficial frostbite of unspecified knee and lower leg, initial encounterCMS: Superficial frostbite of unsp knee and lower leg, init | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.70XD | Superficial frostbite of unspecified knee and lower leg, subsequent encounterCMS: Superficial frostbite of unsp knee and lower leg, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.70XS | Superficial frostbite of unspecified knee and lower leg, sequelaCMS: Superficial frostbite of unsp knee and lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.71 Superficial frostbite of right knee and lower leg | ||||
| T33.71XA | Superficial frostbite of right knee and lower leg, initial encounterCMS: Superficial frostbite of right knee and lower leg, init | Can lead a claim | A | None |
| T33.71XD | Superficial frostbite of right knee and lower leg, subsequent encounterCMS: Superficial frostbite of right knee and lower leg, subs | Can lead a claim | A | None |
| T33.71XS | Superficial frostbite of right knee and lower leg, sequela | Can lead a claim | A | None |
| T33.72 Superficial frostbite of left knee and lower leg | ||||
| T33.72XA | Superficial frostbite of left knee and lower leg, initial encounterCMS: Superficial frostbite of left knee and lower leg, init | Can lead a claim | A | None |
| T33.72XD | Superficial frostbite of left knee and lower leg, subsequent encounterCMS: Superficial frostbite of left knee and lower leg, subs | Can lead a claim | A | None |
| T33.72XS | Superficial frostbite of left knee and lower leg, sequela | Can lead a claim | A | None |
| T33.8 Superficial frostbite of ankle, foot, and toe(s) | ||||
| T33.81 Superficial frostbite of ankle | ||||
| T33.811 Superficial frostbite of right ankle | ||||
| T33.811A | Superficial frostbite of right ankle, initial encounter | Can lead a claim | A | None |
| T33.811D | Superficial frostbite of right ankle, subsequent encounter | Can lead a claim | A | None |
| T33.811S | Superficial frostbite of right ankle, sequela | Can lead a claim | A | None |
| T33.812 Superficial frostbite of left ankle | ||||
| T33.812A | Superficial frostbite of left ankle, initial encounter | Can lead a claim | A | None |
| T33.812D | Superficial frostbite of left ankle, subsequent encounter | Can lead a claim | A | None |
| T33.812S | Superficial frostbite of left ankle, sequela | Can lead a claim | A | None |
| T33.819 Superficial frostbite of unspecified ankle | ||||
| T33.819A | Superficial frostbite of unspecified ankle, initial encounterCMS: Superficial frostbite of unspecified ankle, init encntr | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.819D | Superficial frostbite of unspecified ankle, subsequent encounterCMS: Superficial frostbite of unspecified ankle, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.819S | Superficial frostbite of unspecified ankle, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.82 Superficial frostbite of foot | ||||
| T33.821 Superficial frostbite of right foot | ||||
| T33.821A | Superficial frostbite of right foot, initial encounter | Can lead a claim | A | None |
| T33.821D | Superficial frostbite of right foot, subsequent encounter | Can lead a claim | A | None |
| T33.821S | Superficial frostbite of right foot, sequela | Can lead a claim | A | None |
| T33.822 Superficial frostbite of left foot | ||||
| T33.822A | Superficial frostbite of left foot, initial encounter | Can lead a claim | A | None |
| T33.822D | Superficial frostbite of left foot, subsequent encounter | Can lead a claim | A | None |
| T33.822S | Superficial frostbite of left foot, sequela | Can lead a claim | A | None |
| T33.829 Superficial frostbite of unspecified foot | ||||
| T33.829A | Superficial frostbite of unspecified foot, initial encounter | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.829D | Superficial frostbite of unspecified foot, subsequent encounterCMS: Superficial frostbite of unspecified foot, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.829S | Superficial frostbite of unspecified foot, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.83 Superficial frostbite of toe(s) | ||||
| T33.831 Superficial frostbite of right toe(s) | ||||
| T33.831A | Superficial frostbite of right toe(s), initial encounter | Can lead a claim | A | None |
| T33.831D | Superficial frostbite of right toe(s), subsequent encounter | Can lead a claim | A | None |
| T33.831S | Superficial frostbite of right toe(s), sequela | Can lead a claim | A | None |
| T33.832 Superficial frostbite of left toe(s) | ||||
| T33.832A | Superficial frostbite of left toe(s), initial encounter | Can lead a claim | A | None |
| T33.832D | Superficial frostbite of left toe(s), subsequent encounter | Can lead a claim | A | None |
| T33.832S | Superficial frostbite of left toe(s), sequela | Can lead a claim | A | None |
| T33.839 Superficial frostbite of unspecified toe(s) | ||||
| T33.839A | Superficial frostbite of unspecified toe(s), initial encounterCMS: Superficial frostbite of unspecified toe(s), init encntr | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.839D | Superficial frostbite of unspecified toe(s), subsequent encounterCMS: Superficial frostbite of unspecified toe(s), subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.839S | Superficial frostbite of unspecified toe(s), sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.9 Superficial frostbite of other and unspecified sites | ||||
| T33.90 Superficial frostbite of unspecified sites | ||||
| T33.90XA | Superficial frostbite of unspecified sites, initial encounterCMS: Superficial frostbite of unspecified sites, init encntr | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| T33.90XD | Superficial frostbite of unspecified sites, subsequent encounterCMS: Superficial frostbite of unspecified sites, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.90XS | Superficial frostbite of unspecified sites, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T33.99 Superficial frostbite of other sites | ||||
| T33.99XA | Superficial frostbite of other sites, initial encounter | Can lead a claim | A | None |
| T33.99XD | Superficial frostbite of other sites, subsequent encounter | Can lead a claim | A | None |
| T33.99XS | Superficial frostbite of other sites, sequela | Can lead a claim | A | 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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