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ICD-10-CM 2027 diagnosis code

M77.5Other enthesopathy of foot and ankle

Not billable — use a more specific code

M77.5 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code last changed in FY2020 (effective October 1, 2019). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M77.5

M77.5 is the ICD-10-CM diagnosis code for other enthesopathy of foot and ankle. It belongs to category M77 (other enthesopathies), block M70-M79 (other soft tissue disorders) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within M77, choose M77.5 (Other enthesopathy of foot and ankle) only when documentation doesn't support a more specific option: medial epicondylitis (M77.0), lateral epicondylitis (M77.1), Periarthritis of wrist (M77.2), Calcaneal spur (M77.3), Metatarsalgia (M77.4), not elsewhere classified (M77.8) and enthesopathy, unspecified (M77.9).

To report this condition, pick the subcode that matches the documentation: M77.50 (ankle), M77.51 (ankle) and M77.52 (ankle).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2020 (title revised).

Specific codes under M77.5

Notes that apply from higher levels

Instructions written at a parent level also apply to M77.5.

› From M77 Other enthesopathies
Excludes1
Excludes2
  • bursitis due to use, overuse and pressure (M70.-)
  • osteophyte (M25.7)
  • spinal enthesopathy (M46.0-)

Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to M77.5.

Codes whose notes reference M77.5

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • FY2020 (effective 10/1/2019): Title revised — was “Other enthesopathy of foot”

Common questions about M77.5

Is M77.5 billable?

No. M77.5 is a header code. Report one of its more specific subcodes instead.