---
title: "ICD-10-CM G43.A1: Cyclical vomiting, in migraine… | BillingBrief"
description: "ICD-10-CM code G43.A1: Cyclical vomiting, in migraine, intractable. Category, related codes, and the official source, in plain English."
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language: "en"
---

# G43.A1 Cyclical vomiting, in migraine, intractable

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Cyclical vomiting, in migraine, intractable

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Also covers

-   Cyclical vomiting, with refractory migraine

### Note

-   the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   cyclical vomiting syndrome unrelated to migraine ([R11.15](https://billingbrief.com/icd10/r11.15/))
-   lower half migraine (G44.00)

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   headache NOS ([R51.9](https://billingbrief.com/icd10/r51.9/))
-   headache syndromes (G44.-)

### Use additional code

Add a second code for the following, when documented.

-   code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

## Related codes

-   [`G43.709` Chronic migraine without aura, not intractable, without status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.709/)
-   [`G43.711` Chronic migraine without aura, intractable, with status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.711/)
-   [`G43.719` Chronic migraine without aura, intractable, without status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.719/)
-   [`G43.A0` Cyclical vomiting, in migraine, not intractable ICD-10-CM](https://billingbrief.com/icd10/g43.a0/)
-   [`G43.B0` Ophthalmoplegic migraine, not intractable ICD-10-CM](https://billingbrief.com/icd10/g43.b0/)
-   [`G43.B1` Ophthalmoplegic migraine, intractable ICD-10-CM](https://billingbrief.com/icd10/g43.b1/)
-   [`G43.C0` Periodic headache syndromes in child or adult, not intractable ICD-10-CM](https://billingbrief.com/icd10/g43.c0/)
-   [`G43.C1` Periodic headache syndromes in child or adult, intractable ICD-10-CM](https://billingbrief.com/icd10/g43.c1/)

## Common questions

### Is G43.A1 a billable code?

Yes. G43.A1 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

G43 Migraine

Chapter

Diseases of the nervous system

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).