M77: Other enthesopathies
Codes under M77 (Other enthesopathies). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| M77.0 | Medial epicondylitis | — |
| M77.0 | Medial epicondylitis | — |
| M77.00 | Medial epicondylitis, unspecified elbow | ✓ |
| M77.00 | Medial epicondylitis, unspecified elbow | ✓ |
| M77.01 | Medial epicondylitis, right elbow | ✓ |
| M77.01 | Medial epicondylitis, right elbow | ✓ |
| M77.1 | Lateral epicondylitis | — |
| M77.1 | Lateral epicondylitis | — |
| M77.02 | Medial epicondylitis, left elbow | ✓ |
| M77.02 | Medial epicondylitis, left elbow | ✓ |
| M77.2 | Periarthritis of wrist | — |
| M77.2 | Periarthritis of wrist | — |
| M77.3 | Calcaneal spur | — |
| M77.3 | Calcaneal spur | — |
| M77.4 | Metatarsalgia | — |
| M77.4 | Metatarsalgia | — |
| M77.5 | Other enthesopathy of foot and ankle | — |
| M77.5 | Other enthesopathy of foot and ankle | — |
| M77.8 | Other enthesopathies, not elsewhere classified | ✓ |
| M77.8 | Other enthesopathies, not elsewhere classified | ✓ |
| M77.9 | Enthesopathy, unspecified | ✓ |
| M77.9 | Enthesopathy, unspecified | ✓ |
| M77.10 | Lateral epicondylitis, unspecified elbow | ✓ |
| M77.10 | Lateral epicondylitis, unspecified elbow | ✓ |
| M77.11 | Lateral epicondylitis, right elbow | ✓ |
| M77.11 | Lateral epicondylitis, right elbow | ✓ |
| M77.12 | Lateral epicondylitis, left elbow | ✓ |
| M77.12 | Lateral epicondylitis, left elbow | ✓ |
| M77.20 | Periarthritis, unspecified wrist | ✓ |
| M77.20 | Periarthritis, unspecified wrist | ✓ |
| M77.21 | Periarthritis, right wrist | ✓ |
| M77.21 | Periarthritis, right wrist | ✓ |
| M77.22 | Periarthritis, left wrist | ✓ |
| M77.22 | Periarthritis, left wrist | ✓ |
| M77.30 | Calcaneal spur, unspecified foot | ✓ |
| M77.30 | Calcaneal spur, unspecified foot | ✓ |
| M77.31 | Calcaneal spur, right foot | ✓ |
| M77.31 | Calcaneal spur, right foot | ✓ |
| M77.32 | Calcaneal spur, left foot | ✓ |
| M77.32 | Calcaneal spur, left foot | ✓ |
| M77.40 | Metatarsalgia, unspecified foot | ✓ |
| M77.40 | Metatarsalgia, unspecified foot | ✓ |
| M77.41 | Metatarsalgia, right foot | ✓ |
| M77.41 | Metatarsalgia, right foot | ✓ |
| M77.42 | Metatarsalgia, left foot | ✓ |
| M77.42 | Metatarsalgia, left foot | ✓ |
| M77.50 | Other enthesopathy of unspecified foot and ankle | ✓ |
| M77.50 | Other enthesopathy of unspecified foot and ankle | ✓ |
| M77.51 | Other enthesopathy of right foot and ankle | ✓ |
| M77.51 | Other enthesopathy of right foot and ankle | ✓ |
| M77.52 | Other enthesopathy of left foot and ankle | ✓ |
| M77.52 | Other enthesopathy of left foot and ankle | ✓ |
Frequently asked questions
What is ICD-10-CM code M77?
M77 is an ICD-10-CM category covering Other enthesopathies. It contains 52 more specific diagnosis codes, 40 of which are billable.
Is M77 a billable code?
No — M77 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example M77.0 — Medial epicondylitis). 40 of the 52 codes under M77 are billable.
What codes fall under M77?
M77 includes M77.0, M77.0, M77.00, M77.00, M77.01, plus 47 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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