ICD10BillableValid for clinical use
ICD-10 Code G43.409: Hemiplegic migraine, not intractable, without status migrainosus
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).
When is it used?
- May be used when a clinician documents hemiplegic migraine, not intractable, without status migrainosus in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
6Diseases of the nervous system (G00-G99)
block
G40-G47Episodic and paroxysmal disorders
category
G43Migraine
category
G43.4Hemiplegic migraine
category
G43.40Hemiplegic migraine, not intractable
currentG43.40
Official coding notes
Inclusion terms
- Hemiplegic migraine NOS
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
NeurologistGeneral Physician
Coverage-related procedures and services
CPT 70472high
COMPUTED TOMOGRAPHIC (CT) CEREBRAL PERFUSION ANALYSIS WITH CONTRAST MATERIAL(S), INCLUDING IMAGE POSTPROCESSING PERFORMED WITH CONCURRENT CT OR CT ANGIOGRAPHY OF THE SAME ANATOMY (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 70473high
COMPUTED TOMOGRAPHIC (CT) CEREBRAL PERFUSION ANALYSIS WITH CONTRAST MATERIAL(S), INCLUDING IMAGE POSTPROCESSING PERFORMED WITHOUT CONCURRENT CT OR CT ANGIOGRAPHY OF THE SAME ANATOMY
Source: CMS coverage guidance
CPT 97034high
APPLICATION OF A MODALITY TO 1 OR MORE AREAS; CONTRAST BATHS, EACH 15 MINUTES
Source: CMS coverage guidance
CPT 97032high
APPLICATION OF A MODALITY TO 1 OR MORE AREAS; ELECTRICAL STIMULATION (MANUAL), EACH 15 MINUTES
Source: CMS coverage guidance
CPT 97026high
APPLICATION OF A MODALITY TO 1 OR MORE AREAS; INFRARED
Source: CMS coverage guidance
CPT 97033high
APPLICATION OF A MODALITY TO 1 OR MORE AREAS; IONTOPHORESIS, EACH 15 MINUTES
Source: CMS coverage guidance
Coding guidelines
Common synonyms
Hemiplegic migraine, not intractable, without status migrainosus
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.