ICD-10 diagnosis code

K51 Ulcerative colitis

K51 is the ICD-10 code for Ulcerative colitis. It is a three-character category divided into 7 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block K50–K52 (Noninfective enteritis and colitis) in Chapter XI, Diseases of the digestive system.

Code type: Category (3 characters)
Chapter: XI · K00–K93
Classification: WHO ICD-10, 2019 version

Subcodes of K51

K51 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

K51Ulcerös kolit

DenmarkICD-10-DK

DK51Ulcerøs colitis

FinlandICD-10-FI

K51Haavainen koliitti

K51.1[Pitkäaikainen] haavainen ileumin ja koolonin tulehdus

GermanyICD-10-GM

K51Colitis ulcerosa

FranceICD-10-FR

K51Recto-colite hémorragique [colite ulcéreuse]

NetherlandsICD-10-NL

K51colitis ulcerosa

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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