M20.0Deformity of finger(s)

M20.0 is the ICD-10-CM diagnosis code for deformity of finger(s). It belongs to category M20 (acquired deformities of fingers and toes), block M20-M25 (other joint disorders) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

Within M20 (acquired deformities of fingers and toes), M20.0 is specifically for deformity of finger(s). Related codes cover Hallux valgus (acquired) (M20.1), 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: M20.00 (finger(s)), M20.01 (finger), M20.02 (deformity), M20.03 (deformity) and M20.09 (finger(s)).

Don't report M20.0 together with the conditions in its Excludes1 note: clubbing of fingers (R68.3), palmar fascial fibromatosis [Dupuytren] (M72.0) and trigger finger (M65.3).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.