G43.409 Hemiplegic migraine, not intractable, without status migrainosus
Billable ICD-10-CM code, FY2026.
Applicable to
Hemiplegic migraine NOS
Applies from G43 Migraine
Excludes1 (never code together)
headache NOS (R51.9)
lower half migraine (G44.00)
Excludes2 (not included here)
headache syndromes (G44.-)
Use additional code
code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Notes
the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
Applies from G43.4 Hemiplegic migraine
Applicable to
Familial migraine
Sporadic migraine
Applies from G43.40 Hemiplegic migraine, not intractable
Applicable to
Hemiplegic migraine without refractory migraine
Risk adjustment (HCC)
RxHCC V08: HCC 166 — Migraine Headaches
MS-DRG index
Defines the logic of DRG(s) 102-103 in MDC 01.
Approximate ICD-9-CM (GEMs)
346.30 Hemiplegic migraine, without mention of intractable migraine without mention of status migrainosus
Code annotations containing back-references to G43.409
Back-references to G43
Type 2 Excludes: G44 Other headache syndromes ("migraines (G43.-)")
Type 2 Excludes: G44.1 Vascular headache, not elsewhere classified ("migraine (G43.-)")
Type 2 Excludes: G89 Pain, not elsewhere classified ("migraines (G43.-)")
Type 2 Excludes: R51 Headache ("migraine and other headache syndromes (G43-G44)")
Diagnosis Index entries for G43.409
Migraine (idiopathic) › hemiplegic
Migraine (idiopathic) › hemiplegic › not intractable
Migraine (idiopathic) › hemiplegic › not intractable › without status migrainosus
Migraine (idiopathic) › hemiplegic › without refractory migraine
Migraine (idiopathic) › hemiplegic › without refractory migraine › without status migrainosus
Nearby codes
G43.111 Migraine with aura, intractable, with status migrainosus
G43.119 Migraine with aura, intractable, without status migrainosus