2020 ICD-10-CM Diagnosis Code G44.1

Vascular headache, not elsewhere classified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • G44.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM G44.1 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of G44.1 - other international versions of ICD-10 G44.1 may differ.
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (G44.1) and the excluded code together.
  • cluster headache (
    ICD-10-CM Diagnosis Code G44.0

    Cluster headaches and other trigeminal autonomic cephalgias (TAC)

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    G44.0
    )
  • complicated headache syndromes (
    ICD-10-CM Diagnosis Code G44.5

    Complicated headache syndromes

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    G44.5-
    )
  • drug-induced headache (
    ICD-10-CM Diagnosis Code G44.4

    Drug-induced headache, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    • Medication overuse headache
    Use Additional
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
    G44.4-
    )
  • migraine (
    ICD-10-CM Diagnosis Code G43
    • G43 Migraine
      • G43.0 Migraine without aura
        • G43.00 Migraine without aura, not intractable
          • G43.001 Migraine without aura, not intractable, with ...
          • G43.009 Migraine without aura, not intractable, witho...
        • G43.01 Migraine without aura, intractable
          • G43.011 Migraine without aura, intractable, with stat...
          • G43.019 Migraine without aura, intractable, without s...
      • G43.1 Migraine with aura
        • G43.10 Migraine with aura, not intractable
          • G43.101 Migraine with aura, not intractable, with sta...
          • G43.109 Migraine with aura, not intractable, without ...
        • G43.11 Migraine with aura, intractable
          • G43.111 Migraine with aura, intractable, with status ...
          • G43.119 Migraine with aura, intractable, without stat...
      • G43.4 Hemiplegic migraine
        • G43.40 Hemiplegic migraine, not intractable
          • G43.401 Hemiplegic migraine, not intractable, with st...
          • G43.409 Hemiplegic migraine, not intractable, without...
        • G43.41 Hemiplegic migraine, intractable
          • G43.411 Hemiplegic migraine, intractable, with status...
          • G43.419 Hemiplegic migraine, intractable, without sta...
      • G43.5 Persistent migraine aura without cerebral inf...
        • G43.50 Persistent migraine aura without cerebral inf...
          • G43.501 Persistent migraine aura without cerebral inf...
          • G43.509 Persistent migraine aura without cerebral inf...
        • G43.51 Persistent migraine aura without cerebral inf...
          • G43.511 Persistent migraine aura without cerebral inf...
          • G43.519 Persistent migraine aura without cerebral inf...
      • G43.6 Persistent migraine aura with cerebral infarc...
        • G43.60 Persistent migraine aura with cerebral infarc...
          • G43.601 Persistent migraine aura with cerebral infarc...
          • G43.609 Persistent migraine aura with cerebral infarc...
        • G43.61 Persistent migraine aura with cerebral infarc...
          • G43.611 Persistent migraine aura with cerebral infarc...
          • G43.619 Persistent migraine aura with cerebral infarc...
      • G43.7 Chronic migraine without aura
        • G43.70 Chronic migraine without aura, not intractabl...
          • G43.701 Chronic migraine without aura, not intractabl...
          • G43.709 Chronic migraine without aura, not intractabl...
        • G43.71 Chronic migraine without aura, intractable
          • G43.711 Chronic migraine without aura, intractable, w...
          • G43.719 Chronic migraine without aura, intractable, w...
      • G43.A Cyclical vomiting
        • G43.A0 Cyclical vomiting, in migraine, not intractab...
        • G43.A1 …… in migraine, intractable
      • G43.B Ophthalmoplegic migraine
      • G43.C Periodic headache syndromes in child or adult...
        • G43.C0 Periodic headache syndromes in child or adult...
        • G43.C1 Periodic headache syndromes in child or adult...
      • G43.D Abdominal migraine
      • G43.8 Other migraine
        • G43.80 Other migraine, not intractable
          • G43.801 Other migraine, not intractable, with status ...
          • G43.809 Other migraine, not intractable, without stat...
        • G43.81 Other migraine, intractable
          • G43.811 Other migraine, intractable, with status migr...
          • G43.819 Other migraine, intractable, without status m...
        • G43.82 Menstrual migraine, not intractable
          • G43.821 Menstrual migraine, not intractable, with sta...
          • G43.829 Menstrual migraine, not intractable, without ...
        • G43.83 Menstrual migraine, intractable
          • G43.831 Menstrual migraine, intractable, with status ...
          • G43.839 Menstrual migraine, intractable, without stat...
      • G43.9 Migraine, unspecified
        • G43.90 Migraine, unspecified, not intractable
          • G43.901 Migraine, unspecified, not intractable, with ...
          • G43.909 Migraine, unspecified, not intractable, witho...
        • G43.91 Migraine, unspecified, intractable
          • G43.911 Migraine, unspecified, intractable, with stat...
          • G43.919 Migraine, unspecified, intractable, without s...
    G43.-
    )
  • other specified headache syndromes (
    ICD-10-CM Diagnosis Code G44.8

    Other specified headache syndromes

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    G44.8-
    )
  • post-traumatic headache (
    ICD-10-CM Diagnosis Code G44.3

    Post-traumatic headache

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    G44.3-
    )
  • tension-type headache (
    ICD-10-CM Diagnosis Code G44.2

    Tension-type headache

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    G44.2-
    )
The following code(s) above G44.1 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 G44.1:
  • G00-G99
    2020 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 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • headache NOS (R51)
    Type 2 Excludes
    • atypical facial pain (G50.1)
    • headache due to lumbar puncture (G97.1)
    • migraines (G43.-)
    • trigeminal neuralgia (G50.0)
    Other headache syndromes
Approximate Synonyms
  • Vascular headache
ICD-10-CM G44.1 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 102 Headaches with mcc
  • 103 Headaches without mcc

Convert G44.1 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

Diagnosis Index entries containing back-references to G44.1:
  • Headache R51
    ICD-10-CM Diagnosis Code R51

    Headache

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Facial pain NOS
    Type 1 Excludes
    • atypical face pain (G50.1)
    • migraine and other headache syndromes (G43-G44)
    • trigeminal neuralgia (G50.0)
    • vascular NEC G44.1

ICD-10-CM Codes Adjacent To G44.1
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
G44.221 …… intractable
G44.229 …… not intractable

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