M21.9
M21.9 — Unspecified acquired deformity of limb and hand
Non-billable headerICD-10-CMunspecified
M21.9 is a non-billable header ICD-10-CM code for unspecified acquired deformity of limb and hand. It cannot be billed on its own: choose one of the more specific child codes below.
Risk adjustment
M21.9 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 M21.9
6 child codes. Green means billable.
Related codes at this level
Codes that share M21. If M21.9 is not quite right, the correct code is usually one of these.
- M21.0Valgus deformity, not elsewhere classified
- M21.1Varus deformity, not elsewhere classified
- M21.2Flexion deformity
- M21.3Wrist or foot drop (acquired)
- M21.4Flat foot [pes planus] (acquired)
- M21.5Acquired clawhand, clubhand, clawfoot and clubfoot
- M21.6Other acquired deformities of foot
- M21.7Unequal limb length (acquired)
- M21.8Other specified acquired deformities of limbs
Questions about M21.9
- Is M21.9 a billable ICD-10-CM code?
- No. M21.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M21.9 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other joint disorders (M20-M25).