R51 ICD-10-CM Code: Headache
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
R51Headache
ICD-10-CM diagnosis code · United States clinical modification
Where R51 sits
- 1
Chapter 18
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
- 2
Section
General symptoms and signs (R50-R69)
- 3
Category R51
Headache
- 4
Code R51
Headache
Codes under R51
R51 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for R51.
Code first
No “code first” instruction is listed for R51.
Use additional code
No “use additional code” instruction is listed for R51.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for R51.
Excludes2
Conditions not included here that may be reported separately when present.
- atypical face pain (G50.1)
- migraine and other headache syndromes (G43-G44)
- trigeminal neuralgia (G50.0)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code R51 mean?
R51 is the FY 2027 U.S. ICD-10-CM code for “Headache.”
Is R51 a billable or specific ICD-10-CM code?
No. R51 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is R51 located in ICD-10-CM?
R51 is listed in Chapter 18, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), within General symptoms and signs (R50-R69) (R50–R69), under category R51, Headache.
What coding notes are listed for R51?
No inclusion terms are listed for R51 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: atypical face pain (G50.1); migraine and other headache syndromes (G43-G44); trigeminal neuralgia (G50.0).