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R51

⚠ Non-billable (Header)

Headache

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

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

direct

May be coded together if both conditions coexist

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

Child Codes (2)

R51.0Headache with orthostatic component, not elsewhere classifiedR51.9Headache, unspecified

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Code Information

CodeR51
BillableNo — Header code
CategorySymptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Excludes10 rule(s)
Excludes23 note(s)
Child codes2

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)