G44.31
⚠ Non-billable
Acute post-traumatic headache
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G44.31
System
ICD-10-CM
Billable
No — use specific code
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 G44.31?
ICD-10-CM code G44.31 represents Acute post-traumatic headache. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G44.31 billable?
No. G44.31 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is G44.31 in?
G44.31 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
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