ICD-9-CM diagnosis code (retired)
339.02 — Chronic cluster headache
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 339.02
339.02 is an ICD-9-CM diagnosis code for chronic cluster headache. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, G44.029 (Chronic cluster headache, not intractable). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- G44.029Chronic cluster headache, not intractableapproximate
Common questions about 339.02
What is the ICD-10 code for ICD-9 339.02?
- The GEMs map 339.02 to ICD-10-CM G44.029.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.