ICD-10 · PDGM grouping
S44 Injury of nerves at shoulder and upper arm level
All 72 codes in the S44 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
72
Can lead a claim
42
Cannot lead a claim
30
What CMS assigns to S44
42 of the 72 codes group to Neuro Rehabilitation; 30 are assigned no clinical group. None of the 72 is assigned a comorbidity subgroup. 42 of the 72 can lead a claim.
Every code in S44
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 |
|---|---|---|---|---|
| S44.0 Injury of ulnar nerve at upper arm level | ||||
| S44.00 Injury of ulnar nerve at upper arm level, unspecified arm | ||||
| S44.00XA | Injury of ulnar nerve at upper arm level, unspecified arm, initial encounterCMS: Injury of ulnar nerve at upper arm level, unsp arm, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.00XD | Injury of ulnar nerve at upper arm level, unspecified arm, subsequent encounterCMS: Injury of ulnar nerve at upper arm level, unsp arm, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.00XS | Injury of ulnar nerve at upper arm level, unspecified arm, sequelaCMS: Injury of ulnar nerve at upper arm level, unsp arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.01 Injury of ulnar nerve at upper arm level, right arm | ||||
| S44.01XA | Injury of ulnar nerve at upper arm level, right arm, initial encounterCMS: Injury of ulnar nerve at upper arm level, right arm, init | Can lead a claim | B | None |
| S44.01XD | Injury of ulnar nerve at upper arm level, right arm, subsequent encounterCMS: Injury of ulnar nerve at upper arm level, right arm, subs | Can lead a claim | B | None |
| S44.01XS | Injury of ulnar nerve at upper arm level, right arm, sequela | Can lead a claim | B | None |
| S44.02 Injury of ulnar nerve at upper arm level, left arm | ||||
| S44.02XA | Injury of ulnar nerve at upper arm level, left arm, initial encounterCMS: Injury of ulnar nerve at upper arm level, left arm, init | Can lead a claim | B | None |
| S44.02XD | Injury of ulnar nerve at upper arm level, left arm, subsequent encounterCMS: Injury of ulnar nerve at upper arm level, left arm, subs | Can lead a claim | B | None |
| S44.02XS | Injury of ulnar nerve at upper arm level, left arm, sequela | Can lead a claim | B | None |
| S44.1 Injury of median nerve at upper arm level | ||||
| S44.10 Injury of median nerve at upper arm level, unspecified arm | ||||
| S44.10XA | Injury of median nerve at upper arm level, unspecified arm, initial encounterCMS: Injury of median nerve at upper arm level, unsp arm, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.10XD | Injury of median nerve at upper arm level, unspecified arm, subsequent encounterCMS: Injury of median nerve at upper arm level, unsp arm, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.10XS | Injury of median nerve at upper arm level, unspecified arm, sequelaCMS: Injury of median nerve at upper arm level, unsp arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.11 Injury of median nerve at upper arm level, right arm | ||||
| S44.11XA | Injury of median nerve at upper arm level, right arm, initial encounterCMS: Injury of median nerve at upper arm level, right arm, init | Can lead a claim | B | None |
| S44.11XD | Injury of median nerve at upper arm level, right arm, subsequent encounterCMS: Injury of median nerve at upper arm level, right arm, subs | Can lead a claim | B | None |
| S44.11XS | Injury of median nerve at upper arm level, right arm, sequelaCMS: Injury of median nrv at upper arm level, right arm, sequela | Can lead a claim | B | None |
| S44.12 Injury of median nerve at upper arm level, left arm | ||||
| S44.12XA | Injury of median nerve at upper arm level, left arm, initial encounterCMS: Injury of median nerve at upper arm level, left arm, init | Can lead a claim | B | None |
| S44.12XD | Injury of median nerve at upper arm level, left arm, subsequent encounterCMS: Injury of median nerve at upper arm level, left arm, subs | Can lead a claim | B | None |
| S44.12XS | Injury of median nerve at upper arm level, left arm, sequela | Can lead a claim | B | None |
| S44.2 Injury of radial nerve at upper arm level | ||||
| S44.20 Injury of radial nerve at upper arm level, unspecified arm | ||||
| S44.20XA | Injury of radial nerve at upper arm level, unspecified arm, initial encounterCMS: Injury of radial nerve at upper arm level, unsp arm, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.20XD | Injury of radial nerve at upper arm level, unspecified arm, subsequent encounterCMS: Injury of radial nerve at upper arm level, unsp arm, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.20XS | Injury of radial nerve at upper arm level, unspecified arm, sequelaCMS: Injury of radial nerve at upper arm level, unsp arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.21 Injury of radial nerve at upper arm level, right arm | ||||
| S44.21XA | Injury of radial nerve at upper arm level, right arm, initial encounterCMS: Injury of radial nerve at upper arm level, right arm, init | Can lead a claim | B | None |
| S44.21XD | Injury of radial nerve at upper arm level, right arm, subsequent encounterCMS: Injury of radial nerve at upper arm level, right arm, subs | Can lead a claim | B | None |
| S44.21XS | Injury of radial nerve at upper arm level, right arm, sequelaCMS: Injury of radial nrv at upper arm level, right arm, sequela | Can lead a claim | B | None |
| S44.22 Injury of radial nerve at upper arm level, left arm | ||||
| S44.22XA | Injury of radial nerve at upper arm level, left arm, initial encounterCMS: Injury of radial nerve at upper arm level, left arm, init | Can lead a claim | B | None |
| S44.22XD | Injury of radial nerve at upper arm level, left arm, subsequent encounterCMS: Injury of radial nerve at upper arm level, left arm, subs | Can lead a claim | B | None |
| S44.22XS | Injury of radial nerve at upper arm level, left arm, sequela | Can lead a claim | B | None |
| S44.3 Injury of axillary nerve | ||||
| S44.30 Injury of axillary nerve, unspecified arm | ||||
| S44.30XA | Injury of axillary nerve, unspecified arm, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.30XD | Injury of axillary nerve, unspecified arm, subsequent encounterCMS: Injury of axillary nerve, unspecified arm, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.30XS | Injury of axillary nerve, unspecified arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.31 Injury of axillary nerve, right arm | ||||
| S44.31XA | Injury of axillary nerve, right arm, initial encounter | Can lead a claim | B | None |
| S44.31XD | Injury of axillary nerve, right arm, subsequent encounter | Can lead a claim | B | None |
| S44.31XS | Injury of axillary nerve, right arm, sequela | Can lead a claim | B | None |
| S44.32 Injury of axillary nerve, left arm | ||||
| S44.32XA | Injury of axillary nerve, left arm, initial encounter | Can lead a claim | B | None |
| S44.32XD | Injury of axillary nerve, left arm, subsequent encounter | Can lead a claim | B | None |
| S44.32XS | Injury of axillary nerve, left arm, sequela | Can lead a claim | B | None |
| S44.4 Injury of musculocutaneous nerve | ||||
| S44.40 Injury of musculocutaneous nerve, unspecified arm | ||||
| S44.40XA | Injury of musculocutaneous nerve, unspecified arm, initial encounterCMS: Injury of musculocutaneous nerve, unsp arm, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.40XD | Injury of musculocutaneous nerve, unspecified arm, subsequent encounterCMS: Injury of musculocutaneous nerve, unsp arm, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.40XS | Injury of musculocutaneous nerve, unspecified arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.41 Injury of musculocutaneous nerve, right arm | ||||
| S44.41XA | Injury of musculocutaneous nerve, right arm, initial encounterCMS: Injury of musculocutaneous nerve, right arm, init encntr | Can lead a claim | B | None |
| S44.41XD | Injury of musculocutaneous nerve, right arm, subsequent encounterCMS: Injury of musculocutaneous nerve, right arm, subs encntr | Can lead a claim | B | None |
| S44.41XS | Injury of musculocutaneous nerve, right arm, sequela | Can lead a claim | B | None |
| S44.42 Injury of musculocutaneous nerve, left arm | ||||
| S44.42XA | Injury of musculocutaneous nerve, left arm, initial encounterCMS: Injury of musculocutaneous nerve, left arm, init encntr | Can lead a claim | B | None |
| S44.42XD | Injury of musculocutaneous nerve, left arm, subsequent encounterCMS: Injury of musculocutaneous nerve, left arm, subs encntr | Can lead a claim | B | None |
| S44.42XS | Injury of musculocutaneous nerve, left arm, sequela | Can lead a claim | B | None |
| S44.5 Injury of cutaneous sensory nerve at shoulder and upper arm level | ||||
| S44.50 Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm | ||||
| S44.50XA | Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, initial encounterCMS: Inj cutan sensory nerve at shldr/up arm, unsp arm, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.50XD | Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, subsequent encounterCMS: Inj cutan sensory nerve at shldr/up arm, unsp arm, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.50XS | Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, sequelaCMS: Inj cutan sensory nerve at shldr/up arm, unsp arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.51 Injury of cutaneous sensory nerve at shoulder and upper arm level, right arm | ||||
| S44.51XA | Injury of cutaneous sensory nerve at shoulder and upper arm level, right arm, initial encounterCMS: Inj cutan sensory nerve at shldr/up arm, right arm, init | Can lead a claim | B | None |
| S44.51XD | Injury of cutaneous sensory nerve at shoulder and upper arm level, right arm, subsequent encounterCMS: Inj cutan sensory nerve at shldr/up arm, right arm, subs | Can lead a claim | B | None |
| S44.51XS | Injury of cutaneous sensory nerve at shoulder and upper arm level, right arm, sequelaCMS: Inj cutan sensory nerve at shldr/up arm, right arm, sequela | Can lead a claim | B | None |
| S44.52 Injury of cutaneous sensory nerve at shoulder and upper arm level, left arm | ||||
| S44.52XA | Injury of cutaneous sensory nerve at shoulder and upper arm level, left arm, initial encounterCMS: Inj cutan sensory nerve at shldr/up arm, left arm, init | Can lead a claim | B | None |
| S44.52XD | Injury of cutaneous sensory nerve at shoulder and upper arm level, left arm, subsequent encounterCMS: Inj cutan sensory nerve at shldr/up arm, left arm, subs | Can lead a claim | B | None |
| S44.52XS | Injury of cutaneous sensory nerve at shoulder and upper arm level, left arm, sequelaCMS: Inj cutan sensory nerve at shldr/up arm, left arm, sequela | Can lead a claim | B | None |
| S44.8 Injury of other nerves at shoulder and upper arm level | ||||
| S44.8X Injury of other nerves at shoulder and upper arm level | ||||
| S44.8X1 Injury of other nerves at shoulder and upper arm level, right arm | ||||
| S44.8X1A | Injury of other nerves at shoulder and upper arm level, right arm, initial encounterCMS: Injury of nerves at shldr/up arm, right arm, init | Can lead a claim | B | None |
| S44.8X1D | Injury of other nerves at shoulder and upper arm level, right arm, subsequent encounterCMS: Injury of nerves at shldr/up arm, right arm, subs | Can lead a claim | B | None |
| S44.8X1S | Injury of other nerves at shoulder and upper arm level, right arm, sequelaCMS: Injury of nerves at shldr/up arm, right arm, sequela | Can lead a claim | B | None |
| S44.8X2 Injury of other nerves at shoulder and upper arm level, left arm | ||||
| S44.8X2A | Injury of other nerves at shoulder and upper arm level, left arm, initial encounterCMS: Injury of nerves at shldr/up arm, left arm, init | Can lead a claim | B | None |
| S44.8X2D | Injury of other nerves at shoulder and upper arm level, left arm, subsequent encounterCMS: Injury of nerves at shldr/up arm, left arm, subs | Can lead a claim | B | None |
| S44.8X2S | Injury of other nerves at shoulder and upper arm level, left arm, sequelaCMS: Injury of nerves at shldr/up arm, left arm, sequela | Can lead a claim | B | None |
| S44.8X9 Injury of other nerves at shoulder and upper arm level, unspecified arm | ||||
| S44.8X9A | Injury of other nerves at shoulder and upper arm level, unspecified arm, initial encounterCMS: Injury of nerves at shldr/up arm, unsp arm, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.8X9D | Injury of other nerves at shoulder and upper arm level, unspecified arm, subsequent encounterCMS: Injury of nerves at shldr/up arm, unsp arm, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.8X9S | Injury of other nerves at shoulder and upper arm level, unspecified arm, sequelaCMS: Injury of nerves at shldr/up arm, unsp arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.9 Injury of unspecified nerve at shoulder and upper arm level | ||||
| S44.90 Injury of unspecified nerve at shoulder and upper arm level, unspecified arm | ||||
| S44.90XA | Injury of unspecified nerve at shoulder and upper arm level, unspecified arm, initial encounterCMS: Injury of unsp nerve at shldr/up arm, unsp arm, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.90XD | Injury of unspecified nerve at shoulder and upper arm level, unspecified arm, subsequent encounterCMS: Injury of unsp nerve at shldr/up arm, unsp arm, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.90XS | Injury of unspecified nerve at shoulder and upper arm level, unspecified arm, sequelaCMS: Injury of unsp nerve at shldr/up arm, unsp arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.91 Injury of unspecified nerve at shoulder and upper arm level, right arm | ||||
| S44.91XA | Injury of unspecified nerve at shoulder and upper arm level, right arm, initial encounterCMS: Injury of unsp nerve at shldr/up arm, right arm, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.91XD | Injury of unspecified nerve at shoulder and upper arm level, right arm, subsequent encounterCMS: Injury of unsp nerve at shldr/up arm, right arm, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.91XS | Injury of unspecified nerve at shoulder and upper arm level, right arm, sequelaCMS: Injury of unsp nerve at shldr/up arm, right arm, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.92 Injury of unspecified nerve at shoulder and upper arm level, left arm | ||||
| S44.92XA | Injury of unspecified nerve at shoulder and upper arm level, left arm, initial encounterCMS: Injury of unsp nerve at shldr/up arm, left arm, init | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.92XD | Injury of unspecified nerve at shoulder and upper arm level, left arm, subsequent encounterCMS: Injury of unsp nerve at shldr/up arm, left arm, subs | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S44.92XS | Injury of unspecified nerve at shoulder and upper arm level, left arm, sequelaCMS: Injury of unsp nerve at shldr/up arm, left arm, 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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