M19 — Other and unspecified osteoarthritis
M19 is a non-billable header ICD-10-CM code for other and unspecified osteoarthritis. 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.
- polyarthritis (M15.-)
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 M19
These codes carry an Excludes1 note pointing at M19. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M19 alone.
Risk adjustment
M19 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 M19
4 child codes. Green means billable.
Questions about M19
- Is M19 a billable ICD-10-CM code?
- No. M19 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M19 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Osteoarthritis (M15-M19).
- What cannot be coded together with M19?
- M19 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.