ICD-10 Code G44.029 – Chronic cluster headache, not intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G44.029 – Chronic cluster headache, not intractable
What it is
G44.029 identifies chronic cluster headache when the headache pattern is not intractable. It refers to a recurring cluster headache disorder documented as chronic, meaning the condition persists over time rather than occurring only in isolated bouts.
Clinical signs
Clinical features typically include severe unilateral headache attacks with autonomic symptoms such as tearing, nasal congestion, or eyelid swelling. Attacks often recur in a cluster pattern; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents chronic cluster headache and specifies that it is not intractable. Apply it for ongoing cases where the record supports the chronic form and there is no documentation of intractability. If the note is unclear, check documentation before coding.
Do not use for
Do not use this code for cluster headache that is documented as intractable or for other headache types. If the provider does not specify chronic cluster headache, check documentation and code the stated diagnosis.
Coding tip
Match the code to both the chronic status and the “not intractable” wording in the medical record.