ICD-10-CM 2027
ICD-10 code for varus acquired hallux
From the official ICD-10-CM alphabetic index entry “Hallux › varus (acquired)”. Page updated September 29, 2026.
About coding varus acquired hallux
The ICD-10-CM code for varus acquired hallux is M20.3 (Hallux varus (acquired)). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on M20.3.
Within M20 (acquired deformities of fingers and toes), M20.3 is specifically for Hallux varus (acquired). Related codes cover deformity of finger(s) (M20.0), Hallux valgus (acquired) (M20.1), Hallux rigidus (M20.2), other hammer toe(s) (acquired) (M20.4), other deformities of toe(s) (acquired) (M20.5) and acquired deformities of toe(s), unspecified (M20.6).
To report this condition, pick the subcode that matches the documentation: M20.30 (unspecified foot), M20.31 (right foot) and M20.32 (left foot).
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 varus acquired hallux codes (official index)
- congenital Q66.3 — Other congenital varus deformities of feet
Common questions about varus acquired hallux ICD-10 codes
What is the ICD-10 code for varus acquired hallux?
- M20.3 — Hallux varus (acquired) (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: Q66.3.
What is the ICD-10 code for congenital varus acquired hallux?
- Q66.3 — Other congenital varus deformities of feet (header code; choose a more specific subcode).
Is M20.3 billable?
- No. M20.3 is a header code. Report one of its more specific subcodes instead.