ICD-10 · PDGM grouping
T27 Burn and corrosion of respiratory tract
All 24 codes in the T27 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.
Codes in family
24
Can lead a claim
9
Cannot lead a claim
15
What CMS assigns to T27
9 of the 24 codes group to MMTA - Other; 15 are assigned no clinical group. None of the 24 is assigned a comorbidity subgroup. 9 of the 24 can lead a claim. CMS attaches a code-first note to 12 of the 24.
Code first
CMS grouper convention 8, on T27.4XXA, T27.4XXD, T27.4XXS, T27.5XXA, T27.5XXD, T27.5XXS, T27.6XXA, T27.6XXD, T27.6XXS, T27.7XXA, T27.7XXD, T27.7XXS. Code first:
- , if applicable, toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
Every code in T27
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 |
|---|---|---|---|---|
| T27.0 Burn of larynx and trachea | ||||
| T27.0XXA | Burn of larynx and trachea, initial encounter | Can lead a claim | A | None |
| T27.0XXD | Burn of larynx and trachea, subsequent encounter | Can lead a claim | A | None |
| T27.0XXS | Burn of larynx and trachea, sequela | Can lead a claim | A | None |
| T27.1 Burn involving larynx and trachea with lung | ||||
| T27.1XXA | Burn involving larynx and trachea with lung, initial encounterCMS: Burn involving larynx and trachea with lung, init encntr | Can lead a claim | A | None |
| T27.1XXD | Burn involving larynx and trachea with lung, subsequent encounterCMS: Burn involving larynx and trachea with lung, subs encntr | Can lead a claim | A | None |
| T27.1XXS | Burn involving larynx and trachea with lung, sequela | Can lead a claim | A | None |
| T27.2 Burn of other parts of respiratory tract | ||||
| T27.2XXA | Burn of other parts of respiratory tract, initial encounter | Can lead a claim | A | None |
| T27.2XXD | Burn of other parts of respiratory tract, subsequent encounterCMS: Burn of other parts of respiratory tract, subs encntr | Can lead a claim | A | None |
| T27.2XXS | Burn of other parts of respiratory tract, sequela | Can lead a claim | A | None |
| T27.3 Burn of respiratory tract, part unspecified | ||||
| T27.3XXA | Burn of respiratory tract, part unspecified, initial encounterCMS: Burn of respiratory tract, part unspecified, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.3XXD | Burn of respiratory tract, part unspecified, subsequent encounterCMS: Burn of respiratory tract, part unspecified, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.3XXS | Burn of respiratory tract, part unspecified, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.4 Corrosion of larynx and trachea | ||||
| T27.4XXA | Corrosion of larynx and trachea, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.4XXD | Corrosion of larynx and trachea, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.4XXS | Corrosion of larynx and trachea, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.5 Corrosion involving larynx and trachea with lung | ||||
| T27.5XXA | Corrosion involving larynx and trachea with lung, initial encounterCMS: Corrosion involving larynx and trachea w lung, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.5XXD | Corrosion involving larynx and trachea with lung, subsequent encounterCMS: Corrosion involving larynx and trachea w lung, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.5XXS | Corrosion involving larynx and trachea with lung, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.6 Corrosion of other parts of respiratory tract | ||||
| T27.6XXA | Corrosion of other parts of respiratory tract, initial encounterCMS: Corrosion of other parts of respiratory tract, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.6XXD | Corrosion of other parts of respiratory tract, subsequent encounterCMS: Corrosion of other parts of respiratory tract, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.6XXS | Corrosion of other parts of respiratory tract, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.7 Corrosion of respiratory tract, part unspecified | ||||
| T27.7XXA | Corrosion of respiratory tract, part unspecified, initial encounterCMS: Corrosion of respiratory tract, part unsp, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.7XXD | Corrosion of respiratory tract, part unspecified, subsequent encounterCMS: Corrosion of respiratory tract, part unsp, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T27.7XXS | Corrosion of respiratory tract, part unspecified, 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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