ICD-10-CM › R00-R99 › R50-R69 › R51 Headache › R51.9
R51.9
Headache, unspecified
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2021 to now.
- FY2021 Added to the code set Headache, unspecified
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from R51 Headache
Excludes2 - not included here
- atypical face pain (G50.1)
- migraine and other headache syndromes (G43-G44)
- trigeminal neuralgia (G50.0)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Pain
- Pain > head
- Cephalgia, cephalalgia
- Syndrome > complex regional pain
- Headache
- Pain > face, facial
- Headache > nasal septum
- Headache > chronic daily
- Headache > daily chronic
Codes in the same group
| Code | Description | Status |
|---|---|---|
| R51.0 | Headache with orthostatic component, not elsewhere classified | Valid |