ICD-10 Code G43.A1 – Cyclical vomiting, in migraine, intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.A1 – Cyclical vomiting, in migraine, intractable
What it is
This code identifies cyclical vomiting linked to migraine when the episodes are difficult to control. Use it for recurrent vomiting patterns documented as part of a migraine disorder.
Clinical signs
Typical documentation includes repeated, stereotyped vomiting episodes with symptom-free intervals and a migraine association. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider clearly documents cyclical vomiting as migraine-related and specifically notes that it is intractable. It fits cases where the vomiting pattern is recurrent and not adequately controlled. If the record does not support the migraine link or intractability, check documentation.
Do not use for
Do not use this code for vomiting from gastroenteritis, pregnancy, medication effects, or other non-migraine causes. Also avoid it if the record only says vomiting without cyclical pattern or intractable status.
Coding tip
Confirm both the migraine association and the intractable designation in the provider note before assigning G43.A1.