ICD-10-CM Diagnosis Code (2025)
Official Description for G44.00
Cluster headache syndrome, unspecified
Coding Notes & Guidelines for G44.00
Inclusion Terms
- Ciliary neuralgia
- Cluster headache NOS
- Histamine cephalgia
- Lower half migraine
- Migrainous neuralgia
Inclusion Terms
Cluster headache syndrome NOS
Parent Code (Less Specific):
About ICD-10-CM Code G44.00 (Cluster headache syndrome)
ICD-10-CM code G44.00 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM G44.00 became effective on October 1, 2024.
This page provides detailed information about G44.00 - Cluster headache syndrome, unspecified. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Cluster headache syndrome related to unspecified.