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ICD-9-CM diagnosis code (retired)

346.21 — Variants of migraine, not elsewhere classified, with intractable migraine, so stated, without mention of status migrainosus

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 346.21

346.21 is an ICD-9-CM diagnosis code for variants of migraine, not elsewhere classified, with intractable migraine, so stated, without mention of status migrainosus. 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 5 ICD-10-CM codes, such as G43.819 (Other migraine, intractable, without status migrainosus), G43.A1 (Cyclical vomiting, in migraine, intractable) and G43.B1 (Ophthalmoplegic migraine, intractable). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 346.21

What is the ICD-10 code for ICD-9 346.21?

The GEMs map 346.21 to ICD-10-CM G43.819, G43.A1, G43.B1, G43.C1 and G43.D1.

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.