R51.9 Headache, unspecified
ICD-10-CM · CMS code reference
Official ICD-10-CM description: Headache, unspecified
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Also covers
- Facial pain NOS
Excludes2
Not part of this code, but both can be coded when both are documented.
- atypical face pain (G50.1)
- migraine and other headache syndromes (G43-G44)
- trigeminal neuralgia (G50.0)
Related codes
Common questions
Is R51.9 a billable code?
Yes. R51.9 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.