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G44.02

Non-billable

Chronic cluster headache

G44.02 is the ICD-10-CM code for Chronic cluster headache. It is a non-billable category code — use a more specific child code such as G44.021 for billing.

Status
Header (non-billable)
Chapter
G00-G99
Parent
G44.0
Subcodes
2
Edition
FY2026

G00-G99 Diseases of the nervous system

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code G44.02?
G44.02 is the ICD-10-CM code for "Chronic cluster headache". It falls under G00-G99 Diseases of the nervous system.
Is G44.02 a billable code?
No — G44.02 is a non-billable header code. Use a more specific child code (such as G44.021) for billing.
What are the subcodes of G44.02?
G44.02 has 2 more specific child codes, including G44.021, G44.029.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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