ICD-10-CM 2027
ICD-10 code for valgum genu
From the official ICD-10-CM alphabetic index entry “Genu › valgum (acquired) (knock-knee)”. Page updated September 29, 2026.
About coding valgum genu
The ICD-10-CM code for valgum genu is M21.06 (Valgus deformity, not elsewhere classified, knee). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M21.06.
Within M21.0 (valgus deformity, not elsewhere classified), M21.06 is specifically for valgus deformity, not elsewhere classified, knee. Related codes cover unspecified site (M21.00), elbow (M21.02), hip (M21.05) and ankle (M21.07).
To report this condition, pick the subcode that matches the documentation: M21.061 (knee), M21.062 (knee) and M21.069 (knee).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific valgum genu codes (official index)
Common questions about valgum genu ICD-10 codes
What is the ICD-10 code for valgum genu?
- M21.06 — Valgus deformity, not elsewhere classified, knee (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: Q74.1, E64.3.
What is the ICD-10 code for congenital valgum genu?
- Q74.1 — Congenital malformation of knee.
What is the ICD-10 code for sequelae of rickets valgum genu?
- E64.3 — Sequelae of rickets.
Is M21.06 billable?
- No. M21.06 is a header code. Report one of its more specific subcodes instead.