ICD-10 Code G44.1 – Vascular headache, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G44.1 – Vascular headache, not elsewhere classified
What it is
G44.1 is used for headache disorders linked to vascular causes that are not classified elsewhere. It covers headache patterns documented as vascular in origin when no more specific diagnosis is recorded.
Clinical signs
Clinical features vary; refer to documentation. Commonly, the chart should describe a headache with a vascular pattern or a clinician’s diagnosis of vascular headache rather than a nonspecific headache complaint.
When to use this code
Use this code when the provider specifically documents vascular headache and does not identify a more precise subtype. It is appropriate when the record supports a vascular headache diagnosis but lacks enough detail for a different headache code. Check documentation if the cause or subtype is unclear.
Do not use for
Do not use G44.1 for migraine, tension-type headache, cluster headache, or headache attributed to another defined condition. If the note only says “headache” without a vascular diagnosis, choose a more general code or check documentation.
Coding tip
Code G44.1 only when the provider clearly documents vascular headache; otherwise, the diagnosis may be too vague for this code.