ICD-10 · PDGM grouping
T79 Certain early complications of trauma, not elsewhere classified
All 54 codes in the T79 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
54
Can lead a claim
42
Cannot lead a claim
12
What CMS assigns to T79
42 of the 54 codes group to MMTA - Other; 12 are assigned no clinical group. None of the 54 is assigned a comorbidity subgroup. 42 of the 54 can lead a claim.
Every code in T79
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 |
|---|---|---|---|---|
| T79.0 Air embolism (traumatic) | ||||
| T79.0XXA | Air embolism (traumatic), initial encounter | Can lead a claim | A | None |
| T79.0XXD | Air embolism (traumatic), subsequent encounter | Can lead a claim | A | None |
| T79.0XXS | Air embolism (traumatic), sequela | Can lead a claim | A | None |
| T79.1 Fat embolism (traumatic) | ||||
| T79.1XXA | Fat embolism (traumatic), initial encounter | Can lead a claim | A | None |
| T79.1XXD | Fat embolism (traumatic), subsequent encounter | Can lead a claim | A | None |
| T79.1XXS | Fat embolism (traumatic), sequela | Can lead a claim | A | None |
| T79.2 Traumatic secondary and recurrent hemorrhage and seroma | ||||
| T79.2XXA | Traumatic secondary and recurrent hemorrhage and seroma, initial encounterCMS: Traumatic secondary and recurrent hemor and seroma, init | Can lead a claim | A | None |
| T79.2XXD | Traumatic secondary and recurrent hemorrhage and seroma, subsequent encounterCMS: Traumatic secondary and recurrent hemor and seroma, subs | Can lead a claim | A | None |
| T79.2XXS | Traumatic secondary and recurrent hemorrhage and seroma, sequelaCMS: Traumatic secondary and recurrent hemor and seroma, sequela | Can lead a claim | A | None |
| T79.4 Traumatic shock | ||||
| T79.4XXA | Traumatic shock, initial encounter | Can lead a claim | A | None |
| T79.4XXD | Traumatic shock, subsequent encounter | Can lead a claim | A | None |
| T79.4XXS | Traumatic shock, sequela | Can lead a claim | A | None |
| T79.5 Traumatic anuria | ||||
| T79.5XXA | Traumatic anuria, initial encounter | Can lead a claim | A | None |
| T79.5XXD | Traumatic anuria, subsequent encounter | Can lead a claim | A | None |
| T79.5XXS | Traumatic anuria, sequela | Can lead a claim | A | None |
| T79.6 Traumatic ischemia of muscle | ||||
| T79.6XXA | Traumatic ischemia of muscle, initial encounter | Can lead a claim | A | None |
| T79.6XXD | Traumatic ischemia of muscle, subsequent encounter | Can lead a claim | A | None |
| T79.6XXS | Traumatic ischemia of muscle, sequela | Can lead a claim | A | None |
| T79.7 Traumatic subcutaneous emphysema | ||||
| T79.7XXA | Traumatic subcutaneous emphysema, initial encounter | Can lead a claim | A | None |
| T79.7XXD | Traumatic subcutaneous emphysema, subsequent encounter | Can lead a claim | A | None |
| T79.7XXS | Traumatic subcutaneous emphysema, sequela | Can lead a claim | A | None |
| T79.A Traumatic compartment syndrome | ||||
| T79.A0 Compartment syndrome, unspecified | ||||
| T79.A0XA | Compartment syndrome, unspecified, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.A0XD | Compartment syndrome, unspecified, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.A0XS | Compartment syndrome, unspecified, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.A1 Traumatic compartment syndrome of upper extremity | ||||
| T79.A11 Traumatic compartment syndrome of right upper extremity | ||||
| T79.A11A | Traumatic compartment syndrome of right upper extremity, initial encounterCMS: Traumatic compartment syndrome of r up extrem, init | Can lead a claim | A | None |
| T79.A11D | Traumatic compartment syndrome of right upper extremity, subsequent encounterCMS: Traumatic compartment syndrome of r up extrem, subs | Can lead a claim | A | None |
| T79.A11S | Traumatic compartment syndrome of right upper extremity, sequelaCMS: Traumatic compartment syndrome of r up extrem, sequela | Can lead a claim | A | None |
| T79.A12 Traumatic compartment syndrome of left upper extremity | ||||
| T79.A12A | Traumatic compartment syndrome of left upper extremity, initial encounterCMS: Traumatic compartment syndrome of left upper extremity, init | Can lead a claim | A | None |
| T79.A12D | Traumatic compartment syndrome of left upper extremity, subsequent encounterCMS: Traumatic compartment syndrome of left upper extremity, subs | Can lead a claim | A | None |
| T79.A12S | Traumatic compartment syndrome of left upper extremity, sequelaCMS: Traumatic compartment syndrome of l up extrem, sequela | Can lead a claim | A | None |
| T79.A19 Traumatic compartment syndrome of unspecified upper extremity | ||||
| T79.A19A | Traumatic compartment syndrome of unspecified upper extremity, initial encounterCMS: Traumatic compartment syndrome of unsp upper extremity, 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 |
| T79.A19D | Traumatic compartment syndrome of unspecified upper extremity, subsequent encounterCMS: Traumatic compartment syndrome of unsp upper extremity, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.A19S | Traumatic compartment syndrome of unspecified upper extremity, sequelaCMS: Traumatic compartment syndrome of unsp up extrem, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.A2 Traumatic compartment syndrome of lower extremity | ||||
| T79.A21 Traumatic compartment syndrome of right lower extremity | ||||
| T79.A21A | Traumatic compartment syndrome of right lower extremity, initial encounterCMS: Traumatic compartment syndrome of r low extrem, init | Can lead a claim | A | None |
| T79.A21D | Traumatic compartment syndrome of right lower extremity, subsequent encounterCMS: Traumatic compartment syndrome of r low extrem, subs | Can lead a claim | A | None |
| T79.A21S | Traumatic compartment syndrome of right lower extremity, sequelaCMS: Traumatic compartment syndrome of r low extrem, sequela | Can lead a claim | A | None |
| T79.A22 Traumatic compartment syndrome of left lower extremity | ||||
| T79.A22A | Traumatic compartment syndrome of left lower extremity, initial encounterCMS: Traumatic compartment syndrome of left lower extremity, init | Can lead a claim | A | None |
| T79.A22D | Traumatic compartment syndrome of left lower extremity, subsequent encounterCMS: Traumatic compartment syndrome of left lower extremity, subs | Can lead a claim | A | None |
| T79.A22S | Traumatic compartment syndrome of left lower extremity, sequelaCMS: Traumatic compartment syndrome of l low extrem, sequela | Can lead a claim | A | None |
| T79.A29 Traumatic compartment syndrome of unspecified lower extremity | ||||
| T79.A29A | Traumatic compartment syndrome of unspecified lower extremity, initial encounterCMS: Traumatic compartment syndrome of unsp lower extremity, 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 |
| T79.A29D | Traumatic compartment syndrome of unspecified lower extremity, subsequent encounterCMS: Traumatic compartment syndrome of unsp lower extremity, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.A29S | Traumatic compartment syndrome of unspecified lower extremity, sequelaCMS: Traumatic compartment syndrome of unsp low extrm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.A3 Traumatic compartment syndrome of abdomen | ||||
| T79.A3XA | Traumatic compartment syndrome of abdomen, initial encounter | Can lead a claim | A | None |
| T79.A3XD | Traumatic compartment syndrome of abdomen, subsequent encounterCMS: Traumatic compartment syndrome of abdomen, subs encntr | Can lead a claim | A | None |
| T79.A3XS | Traumatic compartment syndrome of abdomen, sequela | Can lead a claim | A | None |
| T79.A9 Traumatic compartment syndrome of other sites | ||||
| T79.A9XA | Traumatic compartment syndrome of other sites, initial encounterCMS: Traumatic compartment syndrome of other sites, init encntr | Can lead a claim | A | None |
| T79.A9XD | Traumatic compartment syndrome of other sites, subsequent encounterCMS: Traumatic compartment syndrome of other sites, subs encntr | Can lead a claim | A | None |
| T79.A9XS | Traumatic compartment syndrome of other sites, sequela | Can lead a claim | A | None |
| T79.8 Other early complications of trauma | ||||
| T79.8XXA | Other early complications of trauma, initial encounter | Can lead a claim | A | None |
| T79.8XXD | Other early complications of trauma, subsequent encounter | Can lead a claim | A | None |
| T79.8XXS | Other early complications of trauma, sequela | Can lead a claim | A | None |
| T79.9 Unspecified early complication of trauma | ||||
| T79.9XXA | Unspecified early complication of trauma, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.9XXD | Unspecified early complication of trauma, subsequent encounterCMS: Unspecified early complication of trauma, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| T79.9XXS | Unspecified early complication of trauma, 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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