ICD-10-CM 2027
ICD-10 code for hemiplegic migraine
From the official ICD-10-CM alphabetic index entry “Migraine (idiopathic) › hemiplegic”. Page updated September 29, 2026.
About coding hemiplegic migraine
The ICD-10-CM code for hemiplegic migraine is G43.409 (Hemiplegic migraine, not intractable, without status migrainosus). The official index lists 12 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G43.409.
Within G43.40, choose G43.409 (without status migrainosus) only when documentation doesn't support a more specific option: with status migrainosus (G43.401).
Use an additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific hemiplegic migraine codes (official index)
- with refractory migraine G43.419 — Hemiplegic migraine, intractable, without status migrainosus
- with status migrainosus G43.411 — Hemiplegic migraine, intractable, with status migrainosus
- without status migrainosus G43.419 — Hemiplegic migraine, intractable, without status migrainosus
- intractable G43.419 — Hemiplegic migraine, intractable, without status migrainosus
- with status migrainosus G43.411 — Hemiplegic migraine, intractable, with status migrainosus
- without status migrainosus G43.419 — Hemiplegic migraine, intractable, without status migrainosus
- not intractable G43.409 — Hemiplegic migraine, not intractable, without status migrainosus
- with status migrainosus G43.401 — Hemiplegic migraine, not intractable, with status migrainosus
- without status migrainosus G43.409 — Hemiplegic migraine, not intractable, without status migrainosus
- without refractory migraine G43.409 — Hemiplegic migraine, not intractable, without status migrainosus
- with status migrainosus G43.401 — Hemiplegic migraine, not intractable, with status migrainosus
- without status migrainosus G43.409 — Hemiplegic migraine, not intractable, without status migrainosus
Common questions about hemiplegic migraine ICD-10 codes
What is the ICD-10 code for hemiplegic migraine?
- G43.409 — Hemiplegic migraine, not intractable, without status migrainosus. More specific codes apply when the documentation supports them: G43.419, G43.411, G43.419, G43.419 and others below.
What is the ICD-10 code for intractable hemiplegic migraine?
- G43.419 — Hemiplegic migraine, intractable, without status migrainosus.
Is G43.409 billable?
- Yes. G43.409 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G43.409 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G43.409 as a principal diagnosis.
Is G43.409 a CC or MCC?
- No. G43.409 is neither a CC nor an MCC under MS-DRG v44.0.