R51: Headache
Codes under R51 (Headache). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| R51.0 | Headache with orthostatic component, not elsewhere classified | ✓ |
| R51.0 | Headache with orthostatic component, not elsewhere classified | ✓ |
| R51.9 | Headache, unspecified | ✓ |
| R51.9 | Headache, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code R51?
R51 is an ICD-10-CM category covering Headache. It contains 4 more specific diagnosis codes, 4 of which are billable.
Is R51 a billable code?
No — R51 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example R51.0 — Headache with orthostatic component, not elsewhere classified). 4 of the 4 codes under R51 are billable.
What codes fall under R51?
R51 includes R51.0, R51.0, R51.9, R51.9. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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