ICD-10 Code G43.A – Cyclical vomiting (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.A – Cyclical vomiting
What it is
G43.A identifies cyclical vomiting, a disorder marked by repeated episodes of severe vomiting separated by symptom-free periods. It is used when the pattern is documented and other causes have been considered.
Clinical signs
Typical findings include sudden, recurrent vomiting episodes with nausea, abdominal discomfort, and return to baseline between attacks. Clinical features vary; refer to documentation.
When to use this code
Use G43.A when the provider documents cyclical vomiting or cyclical vomiting syndrome as the diagnosis. It may also apply when the record clearly describes recurring vomiting episodes with symptom-free intervals and no alternate explanation. Check documentation if the cause is uncertain.
Do not use for
Do not use this code for vomiting due to gastroenteritis, pregnancy, medication effects, or another confirmed condition. If the chart does not support a cyclical pattern, check documentation.
Coding tip
Confirm the recurrent pattern and the provider’s final diagnosis before assigning G43.A.