2021 ICD-10-CM Diagnosis Code G43.A1

Cyclical vomiting, in migraine, intractable

    2016 2017 2018 2019 2020 - Revised Code 2021 Billable/Specific Code
  • G43.A1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM G43.A1 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of G43.A1 - other international versions of ICD-10 G43.A1 may differ.
Applicable To
  • Cyclical vomiting, with refractory migraine
The following code(s) above G43.A1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G43.A1:
  • G00-G99
    2021 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
  • G43
    ICD-10-CM Diagnosis Code G43


      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    • the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
    Type 1 Excludes
    Type 2 Excludes
    • headache syndromes (G44.-)
    Use Additional
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • G43.A
    ICD-10-CM Diagnosis Code G43.A

    Cyclical vomiting

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • cyclical vomiting syndrome unrelated to migraine (R11.15)
    Cyclical vomiting
Approximate Synonyms
  • Cyclical vomiting, intractable
  • Cyclical vomiting, intractable with status migrainosus
  • Intractable cyclical vomiting syndrome
  • Intractable cyclical vomiting with status migrainosus
ICD-10-CM G43.A1 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 102 Headaches with mcc
  • 103 Headaches without mcc

Convert G43.A1 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): Revised code
    • New description: Cyclical vomiting, in migraine, intractable
    • 2019 description: Cyclical vomiting, intractable
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to G43.A1:
  • Vomiting R11.10
    ICD-10-CM Diagnosis Code R11.10

    Vomiting, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Vomiting NOS
    • cyclical, in migraine, G43.A0
      ICD-10-CM Diagnosis Code G43.A0

      Cyclical vomiting, in migraine, not intractable

        2016 2017 2018 2019 2020 - Revised Code 2021 Billable/Specific Code
      Applicable To
      • Cyclical vomiting, without refractory migraine
      • with refractory migraine G43.A1
      • intractable G43.A1

ICD-10-CM Codes Adjacent To G43.A1
G43.619 …… without status migrainosus
G43.7 Chronic migraine without aura
G43.70 Chronic migraine without aura, not intractable
G43.701 …… with status migrainosus
G43.709 …… without status migrainosus
G43.71 Chronic migraine without aura, intractable
G43.711 …… with status migrainosus
G43.719 …… without status migrainosus
G43.A Cyclical vomiting
G43.A0 …… in migraine, not intractable
G43.A1 …… in migraine, intractable
G43.B Ophthalmoplegic migraine
G43.B0 …… not intractable
G43.B1 …… intractable
G43.C Periodic headache syndromes in child or adult
G43.C0 …… not intractable
G43.C1 …… intractable
G43.D Abdominal migraine
G43.D0 …… not intractable
G43.D1 …… intractable
G43.8 Other migraine

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.