All ICD10 Codes
R51Non-billable

Headache

Symptoms, Signs and Abnormal Clinical and Laboratory Findings·General symptoms and signs (R50-R69)·category·FY 2026

Use a more specific code (2 billable)
R51.0Headache with orthostatic component, not elsewhere classifiedR51.9Headache, unspecified

CH18 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • abnormal findings on antenatal screening of mother (O28.-)
  • certain conditions originating in the perinatal period (P04-P96)
  • signs and symptoms classified in the body system chapters
  • signs and symptoms of breast (N63, N64.5)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • atypical face pain (G50.1)
  • migraine and other headache syndromes (G43-G44)
  • trigeminal neuralgia (G50.0)

Clinical Hierarchy

BillableHas subcodes
CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
R50-R69General symptoms and signs (R50-R69)
R51HeadacheNot billable
R51.0Headache with orthostatic component, not elsewhere classifiedBillable
R51.9Headache, unspecifiedBillable

Code History

  • FY 2020: Superseded by R51.0
  • FY 2020: Superseded by R51.9

MS-DRG Classification

2026

No direct MS-DRG triggers identified.