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R51

Non-billable

Headache

R51 is the ICD-10-CM code for Headache. It is a non-billable category code — use a more specific child code such as R51.0 for billing.

Status
Header (non-billable)
Chapter
R00-R99
Subcodes
2
Edition
FY2026

R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Excludes2 — not included here

  • •atypical face pain (G50.1)
  • •migraine and other headache syndromes (G43-G44)
  • •trigeminal neuralgia (G50.0)

Frequently asked questions

What is ICD-10 code R51?
R51 is the ICD-10-CM code for "Headache". It falls under R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Is R51 a billable code?
No — R51 is a non-billable header code. Use a more specific child code (such as R51.0) for billing.
What are the subcodes of R51?
R51 has 2 more specific child codes, including R51.0, R51.9.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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