M21.06
Header — not billableValgus deformity, not elsewhere classified, knee
The ICD-10 code for valgus deformity, not elsewhere classified, knee is M21.06.
M21.06 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Genu valgum
- Knock knee
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- M21.00Valgus deformity, not elsewhere classified, unspecified site
- M21.02Valgus deformity, not elsewhere classified, elbownon-billable header
- M21.05Valgus deformity, not elsewhere classified, hipnon-billable header
- M21.07Valgus deformity, not elsewhere classified, anklenon-billable header
- M21.06Valgus deformity, not elsewhere classified, kneenon-billable header