G44.00
Cluster headache syndrome, unspecified
- Release
- FY 2027
- Effective
Hierarchy
Where G44.00 sits in the official hierarchy. Each level is the code it is classified under.
- G44 Other headache syndromes
- G44.0 Parent Cluster headaches and other trigeminal autonomic cephalgias (TAC)
- G44.00 This code Cluster headache syndrome, unspecified
Official Coding Notes
Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.
Inclusion Terms
Ciliary neuralgia
Inclusion Terms
Cluster headache NOS
Inclusion Terms
Histamine cephalgia
Inclusion Terms
Lower half migraine
Inclusion Terms
Migrainous neuralgia
More Specific Codes
2 codes under G44.00
Version History
How G44.00 appears in each release imported from the official files, newest first.
-
FY 2027 Effective
CurrentCluster headache syndrome, unspecified
-
FY 2026 Effective
UnchangedCluster headache syndrome, unspecified
Related Codes
Other codes under G44.0
Codes whose official notes reference G44.00
Data Source
Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.
- Release
- FY 2027
- Effective
- Source file
- icd10cm-code-descriptions-2027.zip
Official ICD-10-CM source files (opens in a new tab)
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