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ICD-10 diagnosis code

R51 Headache

This page in Swedish

R51 is the ICD-10 code for Headache. It is a three-character category that is not subdivided further. It belongs to the block R50–R69 (General symptoms and signs) in Chapter XVIII, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Code type
Category (3 characters)
Chapter
XVIII · R00–R99
Classification
WHO ICD-10, 2019 version

What R51 includes

Conditions and terms that are coded here.

  • Facial pain NOS

What R51 excludes

Conditions that look similar but belong under another code.

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

R51 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

R51Huvudvärk

  • R51.9Huvudvärk
NorwayICD-10-NO

R51Hodepine

DenmarkICD-10-DK

DR51Hovedpine

  • DR519Hovedpine UNS
FinlandICD-10-FI

R51Päänsärky

  • R51.80Päänsärky
  • R51.81Tarkemmin määrittämättömät kasvokivut
GermanyICD-10-GM

R51Kopfschmerz

FranceICD-10-FR

R51Céphalée

NetherlandsICD-10-NL

R51hoofdpijn

United StatesICD-10-CM

Listed through more specific codes:

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

Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.

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