2022 ICD-10-CM Diagnosis Code G44.0: Cluster Headaches And ...

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2025

  1. ICD-10-CM Codes
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  2. G00-G99
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  3. G40-G47
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  4. G44-
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  5. 2025 ICD-10-CM Diagnosis Code G44.0
2025 ICD-10-CM Diagnosis Code G44.0

Cluster headaches and other trigeminal autonomic cephalgias (TAC)

    2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Non-Billable/Non-Specific Code
  • G44.0 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • Short description: Cluster headaches and oth trigeminal autonm cephalgias (TAC)
  • The 2025 edition of ICD-10-CM G44.0 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of G44.0 - other international versions of ICD-10 G44.0 may differ.
The following code(s) above G44.0 contain annotation back-referencesAnnotation Back-ReferencesIn 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 G44.0:
  • G00-G99 2025 ICD-10-CM Range G00-G99

    Diseases of the nervous systemType 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 2022 2023 2024 2025 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • headache NOS (R51.9)
    Type 2 Excludes
    • atypical facial pain (G50.1)
    • headache due to lumbar puncture (G97.1)
    • migraines (G43.-)
    • trigeminal neuralgia (G50.0)
    Other headache syndromes
Clinical Information
  • A primary headache disorder that is characterized by severe, strictly unilateral pain which is orbital, supraorbital, temporal or in any combination of these sites, lasting 15-180 min. Occurring 1 to 8 times a day. The attacks are associated with one or more of the following, all of which are ipsilateral: conjunctival injection, lacrimation, nasal congestion, rhinorrhea, facial sweating, eyelid edema, and miosis. (international classification of headache disorders, 2nd ed. Cephalalgia 2004: suppl 1)
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
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change
Code annotations containing back-references to G44.0:
  • Type 2 Excludes: G44.1 ICD-10-CM Diagnosis Code G44.1

    Vascular headache, not elsewhere classified

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Billable/Specific Code
    Type 2 Excludes
    • cluster headache (G44.0)
    • complicated headache syndromes (G44.5-)
    • drug-induced headache (G44.4-)
    • migraine (G43.-)
    • other specified headache syndromes (G44.8-)
    • post-traumatic headache (G44.3-)
    • tension-type headache (G44.2-)
ICD-10-CM Codes Adjacent To G44.0 G43.911 …… with status migrainosus G43.919 …… without status migrainosus G43.E Chronic migraine with aura G43.E0 Chronic migraine with aura, not intractable G43.E01 …… with status migrainosus G43.E09 …… without status migrainosus G43.E1 Chronic migraine with aura, intractable G43.E11 …… with status migrainosus G43.E19 …… without status migrainosus G44 Other headache syndromes G44.0 Cluster headaches and other trigeminal autonomic cephalgias (TAC) G44.00 Cluster headache syndrome, unspecified G44.001 …… intractable G44.009 …… not intractable G44.01 Episodic cluster headache G44.011 …… intractable G44.019 …… not intractable G44.02 Chronic cluster headache G44.021 …… intractable G44.029 …… not intractable G44.03 Episodic paroxysmal hemicrania

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

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