ICD-10 Code G43.90 – Migraine, unspecified, not intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.90 – Migraine, unspecified, not intractable
What it is
G43.90 identifies migraine when the record does not specify the type and the headache is not described as intractable. Use it for a migraine diagnosis without more detail.
Clinical signs
Migraine typically presents with recurrent headache episodes, often unilateral or pulsating, and may include nausea, vomiting, or sensitivity to light and sound. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents migraine but does not name a subtype such as with aura or without aura. It also fits when the chart states the migraine is not intractable and no further detail is available. Check documentation if the note suggests a more specific migraine category.
Do not use for
Do not use G43.90 if the record specifies an intractable migraine, a different migraine subtype, or a non-migraine headache diagnosis. Do not assume unspecified coding when the documentation is more precise.
Coding tip
Query the provider when the note mentions migraine but omits subtype or intractability, so you can code the most specific documented diagnosis.