2017/18 ICD-10-CM Diagnosis Code G44.001

Cluster headache syndrome, unspecified, intractable

The following code(s) above G44.001 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 G44.001:
  • G00-G99
    2018 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 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
  • G44.00
    ICD-10-CM Diagnosis Code G44.00

    Cluster headache syndrome, unspecified

      2016 2017 2018 Non-Billable/Non-Specific Code
    Applicable To
    • Ciliary neuralgia
    • Cluster headache NOS
    • Histamine cephalgia
    • Lower half migraine
    • Migrainous neuralgia
    Cluster headache syndrome, unspecified
Approximate Synonyms ICD-10-CM G44.001 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert G44.001 to ICD-9-CM

Code History

Diagnosis Index entries containing back-references to G44.001:

ICD-10-CM Codes Adjacent To G44.001
G43.9 Migraine, unspecified
G43.90 Migraine, unspecified, not intractable
G43.901 …… with status migrainosus
G43.909 …… without status migrainosus
G43.91 Migraine, unspecified, intractable
G43.911 …… with status migrainosus
G43.919 …… 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
G44.031 …… intractable
G44.039 …… not intractable

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