G44.00
Non-billableCluster headache syndrome, unspecified
Cluster headache syndrome, unspecified
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Ciliary neuralgia
- Cluster headache NOS
- Histamine cephalgia
- Lower half migraine
- Migrainous neuralgia
Excludes 2
Conditions not included here, but the patient may have both
- 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)
- atypical facial pain (G50.1)
- headache due to lumbar puncture (G97.1)
- migraines (G43.-)
- trigeminal neuralgia (G50.0)
Child Codes (2)
Also Known As / Clinical Terms
UMLS
- Cephalgia, HistamineC0009088
- Cephalgias, HistamineC0009088
- Chronic Cluster HeadacheC0009088
- Chronic Cluster HeadachesC0009088
- Chronic cluster headacheC0009088
- Chronic cluster headache (disorder)C0009088
- Chronic cluster headache NOSC0009088
- Ciliary NeuralgiaC0009088
- Ciliary NeuralgiasC0009088
- Ciliary neuralgiaC0009088
- Ciliary neuralgia (finding)C0009088
- Cluster HeadacheC0009088
- Cluster Headache SyndromeC0009088
- Cluster Headache SyndromesC0009088
- Cluster Headache, ChronicC0009088
- Cluster HeadachesC0009088
- Cluster Headaches, ChronicC0009088
- Cluster headacheC0009088
- Cluster headache NOSC0009088
- Cluster headache syndromeC0009088
- Cluster headache syndrome (disorder)C0009088
- Cluster headache syndrome NOSC0009088
- Cluster headache syndrome, unspecifiedC0009088
- Cluster headachesC0009088
- Headache Syndrome, ClusterC0009088
- Headache Syndromes, ClusterC0009088
- Headache histamineC0009088
- Headache vasomotorC0009088
- Headache, Chronic ClusterC0009088
- Headache, ClusterC0009088
- Headaches clusterC0009088
- Headaches, Chronic ClusterC0009088
- Headaches, ClusterC0009088
- Histamine CephalgiaC0009088
- Histamine CephalgiasC0009088
- Histamine cephalgiaC0009088
- Histamine headacheC0009088
- Horton SyndromeC0009088
- Horton's SyndromeC0009088
- Horton's headacheC0009088
- Horton's neuralgiaC0009088
- Hortons SyndromeC0009088
- Migraine, NeuralgicC0009088
- Migraines, NeuralgicC0009088
- Migrainous neuralgiaC0009088
- Neuralgia, CiliaryC0009088
- Neuralgias, CiliaryC0009088
- Neuralgic MigraineC0009088
- Neuralgic MigrainesC0009088
- Neuralgic migraineC0009088
- Syndrome, Cluster HeadacheC0009088
- Syndrome, HortonC0009088
- Syndrome, Horton'sC0009088
- Syndromes, Cluster HeadacheC0009088
- Vasomotor headacheC0009088
- chronic cluster headacheC0009088
- chronic cluster headachesC0009088
- cluster headacheC0009088
- cluster headache syndromeC0009088
- cluster headachesC0009088
- clusters headacheC0009088
- headache clusterC0009088
- headache histamineC0009088
- headaches clusterC0009088
- headaches histamineC0009088
- histamine cephalgiaC0009088
- histamine headacheC0009088
- horton syndromeC0009088
- horton's headacheC0009088
- horton's neuralgiaC0009088
- horton's syndromeC0009088
- hortons syndromeC0009088
- migrainous neuralgiaC0009088
- Lower half migraineC0270859
- Lower half migraine (disorder)C0270859
Frequently Asked Questions
What is ICD-10 code G44.00?
ICD-10-CM code G44.00 represents "Cluster headache syndrome, unspecified". It is a non-billable header code — use a more specific child code for billing purposes.
Is G44.00 a billable code?
No, G44.00 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 2 child codes under G44.00.
What chapter is G44.00 in?
G44.00 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G44.00?
G44.00 has Excludes1 notes indicating codes that cannot be used together with it, including: headache NOS (R51.9).
What are the subcategories under G44.00?
G44.00 has 2 child codes, including: G44.001 (Cluster headache syndrome, unspecified, intractable), G44.009 (Cluster headache syndrome, unspecified, not intractable).
What are the UMLS CUIs for G44.00?
G44.00 is linked to 2 UMLS Concept Unique Identifiers: C0009088, C0270859. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.