M77
M77 — Other enthesopathies
Non-billable headerICD-10-CM
M77 is a non-billable header ICD-10-CM code for other enthesopathies. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- bursitis NOS (M71.9-)
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
Other codes that can never be billed with M77
These codes carry an Excludes1 note pointing at M77. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M77 alone.
Risk adjustment
M77 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead M77
8 child codes. Green means billable.
Questions about M77
- Is M77 a billable ICD-10-CM code?
- No. M77 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M77 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other soft tissue disorders (M70-M79).
- What cannot be coded together with M77?
- M77 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.