G43
⚠ Non-billable (Header)Migraine
Diseases of the nervous system (G00-G99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
directThese codes are mutually exclusive. Never code them together.
- • lower half migraine (G44.00)
⚠️ Excludes2
directBoth codes can exist if both conditions are documented.
- • headache NOS (R51.9)
- • headache syndromes (G44.-)
📋 Code Instructions
direct- • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Child Codes (13)
Clinical Description
ICD-10-CM code G43 represents migraine. This code falls under the Diseases of the nervous system (G00-G99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
Frequently Asked Questions
What is ICD-10 code G43?
ICD-10-CM code G43 is "Migraine". It belongs to the category: Diseases of the nervous system (G00-G99).
Is G43 a billable ICD-10 code?
No, G43 is a non-billable header code. A more specific child code must be used for billing.
What codes are excluded with G43?
G43 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can G43 be coded with other codes?
G43 has 2 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)