All ICD10 Codes

R51

Non-Billable
ChapterR00–R99
Rankcategory
Official Description

Headache

Use a more specific code (2 billable)
R51.0Headache with orthostatic component, not elsewhere classifiedR51.9Headache, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (R00-R99).

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

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to R51:

chapterCH18
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
View context instructions

Code History

  • FY 2020: Superseded by R51.0
  • FY 2020: Superseded by R51.9

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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