ICD-10 Code G44.039 – Episodic paroxysmal hemicrania, not intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G44.039 – Episodic paroxysmal hemicrania, not intractable
What it is
This code identifies episodic paroxysmal hemicrania, a rare primary headache disorder with repeated short attacks on one side of the head. The “not intractable” term means the condition is not documented as difficult to control.
Clinical signs
Typical episodes are severe, unilateral head pain lasting minutes and occurring multiple times daily during active periods. Clinical features vary; refer to documentation for associated autonomic signs and diagnostic support.
When to use this code
Use G44.039 when the record clearly states episodic paroxysmal hemicrania and also indicates it is not intractable. Apply it when the diagnosis is established by the treating clinician, even if the note is brief.
If laterality, chronicity, or intractability is not documented, check documentation before assigning the code. Use the most specific headache diagnosis available in the chart.
Do not use for
Do not use this code for other trigeminal autonomic cephalalgias, migraine, or unspecified headache disorders. Do not assign it when the chart documents intractable episodic paroxysmal hemicrania instead.
Coding tip
Confirm both the exact headache type and the “not intractable” wording before coding.