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ICD-10 diagnosis code

K51.9 Ulcerative colitis, unspecified

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K51.9 is the ICD-10 code for Ulcerative colitis, unspecified. It is a four-character subcategory of K51 (Ulcerative colitis), the most specific level in the WHO edition. It belongs to the block K50–K52 (Noninfective enteritis and colitis) in Chapter XI, Diseases of the digestive system.

Code type
Subcategory (4 characters)
Chapter
XI · K00–K93
Classification
WHO ICD-10, 2019 version

K51.9 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

K51.9Ulcerös kolit, ospecificerad

NorwayICD-10-NO

K51.9Uspesifisert ulcerøs kolitt

DenmarkICD-10-DK

DK519Ulcerøs colitis UNS

FinlandICD-10-FI

K51.9Määrittämätön haavainen koliitti

GermanyICD-10-GM

K51.9Colitis ulcerosa, nicht näher bezeichnet

FranceICD-10-FR

K51.9Rectocolite hémorragique, sans précision

NetherlandsICD-10-NL

K51.9colitis ulcerosa, niet-gespecificeerd

United StatesICD-10-CM

Listed through more specific codes:

  • K51.90Ulcerative colitis, unspecified, without complications

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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