ICD-10 Code G44.84 – Primary exertional headache (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G44.84 – Primary exertional headache
What it is
G44.84 identifies a headache triggered by strenuous physical activity, such as exercise or heavy lifting, without another underlying cause. It is used when the headache itself is the primary diagnosis.
Clinical signs
Typical features include headache that begins during or soon after exertion and may be throbbing or bilateral. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents a primary exertional headache and no secondary cause is identified. It fits cases where the headache is clearly linked to physical effort and the record supports that diagnosis. If the note suggests another disorder, check documentation.
Do not use for
Do not use G44.84 when the headache is better explained by trauma, infection, vascular disease, or another secondary cause. Check documentation if the record describes exertion only as a trigger for a different headache type.
Coding tip
Confirm that the provider documented “primary exertional headache,” not just “headache after exercise,” before assigning G44.84.