2021 ICD-10-CM Diagnosis Code G44.091

Other trigeminal autonomic cephalgias (TAC), intractable

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • G44.091 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 G44.091 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of G44.091 - other international versions of ICD-10 G44.091 may differ.
The following code(s) above G44.091 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 G44.091:
  • 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
  • G44
    ICD-10-CM Diagnosis Code G44

    Other headache syndromes

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    • atypical facial pain (G50.1)
    • headache due to lumbar puncture (G97.1)
    • migraines (G43.-)
    • trigeminal neuralgia (G50.0)
    Other headache syndromes
ICD-10-CM G44.091 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 102 Headaches with mcc
  • 103 Headaches without mcc

Convert G44.091 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): No change
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to G44.091:
  • Cephalgia, cephalalgia - see also Headache
    • trigeminal autonomic (TAC) G44.099
      ICD-10-CM Diagnosis Code G44.099

      Other trigeminal autonomic cephalgias (TAC), not intractable

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      • intractable G44.091
  • Horton's headache or neuralgia G44.099
    ICD-10-CM Diagnosis Code G44.099

    Other trigeminal autonomic cephalgias (TAC), not intractable

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • intractable G44.091
  • Neuralgia, neuralgic (acute) M79.2
    ICD-10-CM Diagnosis Code M79.2

    Neuralgia and neuritis, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Type 1 Excludes
    • Horton's G44.099
      ICD-10-CM Diagnosis Code G44.099

      Other trigeminal autonomic cephalgias (TAC), not intractable

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      • intractable G44.091
  • TAC (trigeminal autonomic cephalgia) G44.099
    ICD-10-CM Diagnosis Code G44.099

    Other trigeminal autonomic cephalgias (TAC), not intractable

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • intractable G44.091

ICD-10-CM Codes Adjacent To G44.091
G44.03 Episodic paroxysmal hemicrania
G44.031 …… intractable
G44.039 …… not intractable
G44.04 Chronic paroxysmal hemicrania
G44.041 …… intractable
G44.049 …… not intractable
G44.05 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)
G44.051 …… intractable
G44.059 …… not intractable
G44.09 Other trigeminal autonomic cephalgias (TAC)
G44.091 …… intractable
G44.099 …… not intractable
G44.1 Vascular headache, not elsewhere classified
G44.2 Tension-type headache
G44.20 Tension-type headache, unspecified
G44.201 …… intractable
G44.209 …… not intractable
G44.21 Episodic tension-type headache
G44.211 …… intractable
G44.219 …… not intractable
G44.22 Chronic tension-type headache

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