ICD-10-CM 2027 diagnosis code
M77Other enthesopathies
M77 is a header code, so it can't be reported by itself. Choose one of the 8 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About M77
M77 is the ICD-10-CM diagnosis code for other enthesopathies. It belongs to 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 8 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: M77.0 (epicondylitis), M77.1 (epicondylitis), M77.2 (wrist), M77.3 (spur), M77.4 (Metatarsalgia), M77.5 (ankle), M77.8 (not elsewhere classified) and M77.9 (unspecified).
Don't report M77 together with the conditions in its Excludes1 note: bursitis NOS (M71.9-).
The conditions in its Excludes2 note aren't part of M77, but may be coded alongside it if the patient has both: bursitis due to use, overuse and pressure (M70.-), osteophyte (M25.7) and spinal enthesopathy (M46.0-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under M77
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to M77.
Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.
Codes whose notes reference M77
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M77
Is M77 billable?
- No. M77 is a header code. Report one of its more specific subcodes instead.