Collagenosis, collagen disease (nonvascular) (vascular)

Collagenosis, collagen disease (nonvascular) (vascular) is a main term in the FY2027 ICD-10-CM Alphabetic Index (Index to Diseases and Injuries). The Index lists M35.9 for the term on its own. It has 3 subterms and 4 code entries. First-level subterms include cardiovascular, reactive perforating, specified NEC. Confirm any code you find here in the Tabular List before you report it.