G43.419 Hemiplegic migraine, intractable, without status migrainosus

Billable ICD-10-CM code, FY2026.

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 G43.41 Hemiplegic migraine, intractable

Applicable to

• Hemiplegic migraine with 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)

• 346.31 Hemiplegic migraine, with intractable migraine, so stated, without mention of status migrainosus

Code annotations containing back-references to G43.419

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 G43.419

• Migraine (idiopathic) › hemiplegic › with refractory migraine
• Migraine (idiopathic) › hemiplegic › with refractory migraine › without status migrainosus
• Migraine (idiopathic) › hemiplegic › intractable
• Migraine (idiopathic) › hemiplegic › intractable › without status migrainosus

Nearby codes

• G43.40 Hemiplegic migraine, not intractable
• G43.401 Hemiplegic migraine, not intractable, with status migrainosus
• G43.409 Hemiplegic migraine, not intractable, without status migrainosus
• G43.41 Hemiplegic migraine, intractable
• G43.411 Hemiplegic migraine, intractable, with status migrainosus
• G43.419 Hemiplegic migraine, intractable, without status migrainosus (this code)
• G43.5 Persistent migraine aura without cerebral infarction
• G43.50 Persistent migraine aura without cerebral infarction, not intractable
• G43.501 Persistent migraine aura without cerebral infarction, not intractable, with status migrainosus
• G43.509 Persistent migraine aura without cerebral infarction, not intractable, without status migrainosus
• G43.51 Persistent migraine aura without cerebral infarction, intractable