G43
⚠ Non-billable
Migraine
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G43
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Nervous System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- lower half migraine (G44.00)
Excludes2 — not included here, but may code together
- headache NOS (R51.9)
- headache syndromes (G44.-)
Use additional code
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Note
- the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
Frequently asked questions
What is ICD-10 code G43?
ICD-10-CM code G43 represents Migraine. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G43 billable?
No. G43 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is G43 in?
G43 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G43 category
G43.0
Migraine without aura
Non-billable
G43.1
Migraine with aura
Non-billable
G43.4
Hemiplegic migraine
Non-billable
G43.5
Persistent migraine aura without cerebral infarction
Non-billable
G43.6
Persistent migraine aura with cerebral infarction
Non-billable
G43.7
Chronic migraine without aura
Non-billable
G43.8
Other migraine
Non-billable
G43.00
Migraine without aura, not intractable
Non-billable
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