Alphabetic Index · main term
Buttonhole deformity (finger)
Buttonhole deformity (finger) is a main term in the FY2027 ICD-10-CM Alphabetic Index (Index to Diseases and Injuries). It is a cross-reference: the Index sends you to Deformity, finger, boutonniere, which lists M20.02-. Confirm the code in the Tabular List before you report it.
Where the Index sends you
see Deformity, finger (acquired), boutonniere
Boutonnière deformity