M20.1 — Hallux valgus (acquired)
M20.1 is a non-billable header ICD-10-CM code for hallux valgus (acquired). It cannot be billed on its own: choose one of the more specific child codes below.
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.
- bunion (M21.6-)
Other codes that can never be billed with M20.1
These codes carry an Excludes1 note pointing at M20.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M20.1 alone.
- M71Other bursopathies
Risk adjustment
M20.1 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 M20.1
3 child codes. Green means billable.
Related codes at this level
Codes that share M20. If M20.1 is not quite right, the correct code is usually one of these.
Questions about M20.1
- Is M20.1 a billable ICD-10-CM code?
- No. M20.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M20.1 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other joint disorders (M20-M25).