Alphabetic Index · main term
Horton's headache or neuralgia
At the main termG44.099
Horton's headache or neuralgia is a main term in the FY2027 ICD-10-CM Alphabetic Index (Index to Diseases and Injuries). The Index lists G44.099 for the term on its own. It has 2 subterms and 3 code entries. First-level subterms include intractable, not intractable. Confirm any code you find here in the Tabular List before you report it.