ICD-10 Code G44.89 – Other headache syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G44.89 – Other headache syndrome
What it is
G44.89 identifies headache disorders that do not fit a more specific ICD-10 category. Use it for documented headache syndromes when the provider names a headache condition but not a more precise type.
Clinical signs
Clinical features vary; refer to documentation. Headache may be recurrent or persistent and can be described by location, quality, or associated symptoms, but the record should support a non-specific headache syndrome.
When to use this code
Use this code when the clinician documents “other headache syndrome,” “headache disorder not elsewhere classified,” or a similar non-specific diagnosis. It is appropriate when the note does not support migraine, tension-type, cluster, or another defined headache category. Check documentation if the type is unclear.
Do not use for
Do not use G44.89 when the record supports a more specific headache diagnosis, such as migraine or tension-type headache. Avoid it for headache symptoms alone if the provider has not established a syndrome.
Coding tip
Code the most specific headache diagnosis documented, and query the provider if the headache type is vague but clinically important.