ICD-10 Code G44.21 – Episodic tension-type headache (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G44.21 – Episodic tension-type headache
What it is
G44.21 identifies episodic tension-type headache, a recurring headache disorder with discrete episodes rather than continuous pain. It is used when documentation specifically states the headache type as episodic tension-type.
Clinical signs
Clinical features usually include bilateral, pressing or tightening head pain that is mild to moderate and not worsened by routine activity. Nausea is typically absent, and any associated light or sound sensitivity is limited; clinical features vary, refer to documentation.
When to use this code
Use this code when the provider documents episodic tension-type headache, or when the note clearly supports that diagnosis. Code it for isolated attacks that recur over time, but are not described as chronic, migraine, or another headache disorder.
Do not use for
Do not use G44.21 for migraine, chronic tension-type headache, or headache with a different stated cause. If the record is nonspecific or conflicting, check documentation before assigning the code.
Coding tip
Match the code to the exact headache type and frequency documented; if “episodic” is not stated, confirm the diagnosis before coding.