ICD-10-CM 2027
ICD-10 code for rigidus acquired hallux
From the official ICD-10-CM alphabetic index entry “Hallux › rigidus (acquired)”. Page updated September 29, 2026.
About coding rigidus acquired hallux
The ICD-10-CM code for rigidus acquired hallux is M20.2 (Hallux rigidus). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M20.2.
Within M20 (acquired deformities of fingers and toes), M20.2 is specifically for Hallux rigidus. Related codes cover deformity of finger(s) (M20.0), Hallux valgus (acquired) (M20.1), 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: M20.20 (unspecified foot), M20.21 (right foot) and M20.22 (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 rigidus acquired hallux codes (official index)
Common questions about rigidus acquired hallux ICD-10 codes
What is the ICD-10 code for rigidus acquired hallux?
- M20.2 — Hallux rigidus (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: Q74.2, E64.3.
What is the ICD-10 code for congenital rigidus acquired hallux?
- Q74.2 — Other congenital malformations of lower limb(s), including pelvic girdle.
What is the ICD-10 code for sequelae of rickets rigidus acquired hallux?
- E64.3 — Sequelae of rickets.
Is M20.2 billable?
- No. M20.2 is a header code. Report one of its more specific subcodes instead.