G43.A1 Cyclical vomiting, in migraine, intractable
ICD-10-CM · CMS code reference
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)
- lower half migraine (G44.00)
Excludes2
Not part of this code, but both can be coded when both are documented.
- headache NOS (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
G43.709Chronic migraine without aura, not intractable, without status migrainosus ICD-10-CMG43.711Chronic migraine without aura, intractable, with status migrainosus ICD-10-CMG43.719Chronic migraine without aura, intractable, without status migrainosus ICD-10-CMG43.A0Cyclical vomiting, in migraine, not intractable ICD-10-CMG43.B0Ophthalmoplegic migraine, not intractable ICD-10-CMG43.B1Ophthalmoplegic migraine, intractable ICD-10-CMG43.C0Periodic headache syndromes in child or adult, not intractable ICD-10-CMG43.C1Periodic headache syndromes in child or adult, intractable ICD-10-CM
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.