ICD-10 Code G43.C0 – Periodic headache syndromes in child or adult, not intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.C0 – Periodic headache syndromes in child or adult, not intractable
What it is
This code identifies periodic headache syndromes, such as migraine variants, in a child or adult when the condition is not described as intractable. Use it for recurrent headache disorders documented as periodic and manageable.
Clinical signs
Clinical features vary; refer to documentation. These disorders usually involve repeated headache episodes with a recognizable pattern, and may include associated migraine-type symptoms such as nausea, light sensitivity, or sound sensitivity.
When to use this code
Use G43.C0 when the provider documents a periodic headache syndrome and does not state that it is intractable. This applies to pediatric or adult patients when the record supports a recurrent syndrome rather than a single isolated headache. Check documentation if the note names a specific migraine subtype or a different headache diagnosis.
Do not use for
Do not use this code if the headache is documented as intractable, because a different code may apply. Do not assign it for nonspecific headache complaints or when the record supports another primary headache disorder.
Coding tip
Code the exact headache diagnosis documented by the provider, and verify whether “not intractable” is stated or implied in the record.