ICD-10 · PDGM grouping
M77 Other enthesopathies
All 20 codes in the M77 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
20
Can lead a claim
13
Cannot lead a claim
7
What CMS assigns to M77
13 of the 20 codes group to Musculoskeletal Rehabilitation; 7 are assigned no clinical group. None of the 20 is assigned a comorbidity subgroup. 13 of the 20 can lead a claim.
Every code in M77
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 |
|---|---|---|---|---|
| M77.0 Medial epicondylitis | ||||
| M77.00 | Medial epicondylitis, unspecified elbow | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M77.01 | Medial epicondylitis, right elbow | Can lead a claim | E | None |
| M77.02 | Medial epicondylitis, left elbow | Can lead a claim | E | None |
| M77.1 Lateral epicondylitis | ||||
| M77.10 | Lateral epicondylitis, unspecified elbow | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M77.11 | Lateral epicondylitis, right elbow | Can lead a claim | E | None |
| M77.12 | Lateral epicondylitis, left elbow | Can lead a claim | E | None |
| M77.2 Periarthritis of wrist | ||||
| M77.20 | Periarthritis, unspecified wrist | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M77.21 | Periarthritis, right wrist | Can lead a claim | E | None |
| M77.22 | Periarthritis, left wrist | Can lead a claim | E | None |
| M77.3 Calcaneal spur | ||||
| M77.30 | Calcaneal spur, unspecified foot | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M77.31 | Calcaneal spur, right foot | Can lead a claim | E | None |
| M77.32 | Calcaneal spur, left foot | Can lead a claim | E | None |
| M77.4 Metatarsalgia | ||||
| M77.40 | Metatarsalgia, unspecified foot | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M77.41 | Metatarsalgia, right foot | Can lead a claim | E | None |
| M77.42 | Metatarsalgia, left foot | Can lead a claim | E | None |
| M77.5 Other enthesopathy of foot and ankle | ||||
| M77.50 | Other enthesopathy of unspecified foot and ankle | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M77.51 | Other enthesopathy of right foot and ankle | Can lead a claim | E | None |
| M77.52 | Other enthesopathy of left foot and ankle | Can lead a claim | E | None |
| M77.8 | Other enthesopathies, not elsewhere classified | Can lead a claim | E | None |
| M77.9 | Enthesopathy, unspecified | 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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