M77Header code — not billable
Other enthesopathies
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M77
- Effective date
- October 1, 2026
Related codes in category M77
M77.0Medial epicondylitisM77.00Medial epicondylitis, unspecified elbowYesM77.01Medial epicondylitis, right elbowYesM77.02Medial epicondylitis, left elbowYesM77.1Lateral epicondylitisM77.10Lateral epicondylitis, unspecified elbowYesM77.11Lateral epicondylitis, right elbowYesM77.12Lateral epicondylitis, left elbowYesM77.2Periarthritis of wristM77.20Periarthritis, unspecified wristYesM77.21Periarthritis, right wristYesM77.22Periarthritis, left wristYes
Frequently asked questions
What is ICD-10 code M77?
M77 is an ICD-10-CM diagnosis code for Other enthesopathies.
Is M77 a billable code?
No. M77 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is M77 in?
M77 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M77 become effective?
M77 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M77?
M77 belongs to category M77, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.