ICD-10-CM 2027
ICD-10 code for valgus acquired hallux
From the official ICD-10-CM alphabetic index entry “Hallux › valgus (acquired)”. Page updated September 29, 2026.
About coding valgus acquired hallux
The ICD-10-CM code for valgus acquired hallux is M20.1 (Hallux valgus (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 M20.1.
Within M20 (acquired deformities of fingers and toes), M20.1 is specifically for Hallux valgus (acquired). Related codes cover deformity of finger(s) (M20.0), Hallux rigidus (M20.2), Hallux varus (acquired) (M20.3), 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: M20.10 (unspecified foot), M20.11 (right foot) and M20.12 (left foot).
The conditions in its Excludes2 note aren't part of M20.1, but may be coded alongside it if the patient has both: bunion (M21.6-).
More specific valgus acquired hallux codes (official index)
- congenital Q66.6 — Other congenital valgus deformities of feet
Common questions about valgus acquired hallux ICD-10 codes
What is the ICD-10 code for valgus acquired hallux?
- M20.1 — Hallux valgus (acquired) (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: Q66.6.
What is the ICD-10 code for congenital valgus acquired hallux?
- Q66.6 — Other congenital valgus deformities of feet.
Is M20.1 billable?
- No. M20.1 is a header code. Report one of its more specific subcodes instead.