G43.419 — Hemiplegic migraine, intractable, without status migrainosus
G43.419 is a billable, specific ICD-10-CM code for hemiplegic migraine, intractable, without status migrainosus. It is valid for submission on a claim.
Risk adjustment
G43.419 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
G43.419 is named in 25 Medicare coverage policies — 25 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A53057Billing and Coding: Home Health Occupational Therapy
- A53064Billing and Coding: Outpatient Occupational Therapy
- A56612Billing and Coding: CT of the Head
- A56775Billing and Coding: Magnetic Resonance Angiography
How G43.419 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G43.419.
- Migraine›hemiplegic›intractable
- Migraine›hemiplegic›with refractory migraine
- Migraine›hemiplegic›intractable›without status migrainosus
- Migraine›hemiplegic›with refractory migraine›without status migrainosus
Related codes at this level
Codes that share G43.41. If G43.419 is not quite right, the correct code is usually one of these.
Questions about G43.419
- Is G43.419 a billable ICD-10-CM code?
- Yes. G43.419 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G43.419 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).