Is M77 a billable code?
No. M77 is a header code that groups 20 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
M77: Other enthesopathies
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
M77 groups related diagnoses under other enthesopathies. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under M77
- M77.00Medial epicondylitis, unspecified elbow
- M77.01Medial epicondylitis, right elbow
- M77.02Medial epicondylitis, left elbow
- M77.10Lateral epicondylitis, unspecified elbow
- M77.11Lateral epicondylitis, right elbow
- M77.12Lateral epicondylitis, left elbow
- M77.20Periarthritis, unspecified wrist
- M77.21Periarthritis, right wrist
- M77.22Periarthritis, left wrist
- M77.30Calcaneal spur, unspecified foot
- M77.31Calcaneal spur, right foot
- M77.32Calcaneal spur, left foot
- M77.40Metatarsalgia, unspecified foot
- M77.41Metatarsalgia, right foot
- M77.42Metatarsalgia, left foot
- M77.50Other enthesopathy of unspecified foot and ankle
- M77.51Other enthesopathy of right foot and ankle
- M77.52Other enthesopathy of left foot and ankle
- M77.8Other enthesopathies, not elsewhere classified
- M77.9Enthesopathy, unspecified
M77 questions
What does M77 mean?
M77 is the ICD-10-CM code for Other enthesopathies. It is in chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.