G44.59
✓ Billable
Other complicated headache syndrome
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G44.59
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Nervous System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code G44.59?
ICD-10-CM code G44.59 represents Other complicated headache syndrome. It is a billable diagnosis code in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G44.59 billable?
Yes. G44.59 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is G44.59 in?
G44.59 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G44 category
G44
Other headache syndromes
Non-billable
G44.0
Cluster headaches and other trigeminal autonomic cephalgias (TAC)
Non-billable
G44.1
Vascular headache, not elsewhere classified
Billable
G44.2
Tension-type headache
Non-billable
G44.3
Post-traumatic headache
Non-billable
G44.4
Drug-induced headache, not elsewhere classified
Non-billable
G44.5
Complicated headache syndromes
Non-billable
G44.8
Other specified headache syndromes
Non-billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →