ICD-10 Code G43.81 – Other migraine, intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.81 – Other migraine, intractable
What it is
G43.81 identifies migraine headaches that do not fit a more specific migraine subtype and are documented as intractable, meaning difficult to control. Use the code when the record clearly supports persistent migraine despite usual management.
Clinical signs
Typical migraine features may include recurrent unilateral or throbbing headache, nausea, vomiting, and sensitivity to light or sound. Clinical features vary; refer to documentation.
When to use this code
Use G43.81 when the provider documents “other migraine” and states the condition is intractable, refractory, or poorly controlled. It is appropriate when the chart does not support a more specific migraine code. Check documentation for the exact migraine type and any associated aura or status migrainosus terms.
Do not use for
Do not use this code if the migraine is documented as another specific subtype, such as migraine with aura or without aura. Do not assign it when the record does not support intractability or when documentation is unclear.
Coding tip
Confirm both elements in the note: “other migraine” and “intractable.”