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ICD-10 diagnosis code

I51 Complications and ill-defined descriptions of heart disease

This page in Swedish

I51 is the ICD-10 code for Complications and ill-defined descriptions of heart disease. It is a three-character category divided into 10 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block I30–I52 (Other forms of heart disease) in Chapter IX, Diseases of the circulatory system.

Code type
Category (3 characters)
Chapter
IX · I00–I99
Classification
WHO ICD-10, 2019 version

What I51 excludes

Conditions that look similar but belong under another code.

  • any condition in I51.4-I51.9 due to hypertension I11.-
  • any condition in I51.4-I51.9 due to hypertension
  • complications following acute myocardial infarction I23.-
  • when specified as rheumatic I00-I09

Subcodes of I51

I51 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

I51Ofullständigt preciserade hjärtsjukdomar och komplikationer till hjärtsjukdom

DenmarkICD-10-DK

DI51Dårligt definerede hjertesygdomme og komplikationer til hjertesygdomme

FinlandICD-10-FI

I51Sydänsairauksien komplikaatiot ja epätäydellisesti määritetyt sydänsairaudet

GermanyICD-10-GM

I51Komplikationen einer Herzkrankheit und ungenau beschriebene Herzkrankheit

FranceICD-10-FR

I51Complications de cardiopathies et maladies cardiaques mal définies

NetherlandsICD-10-NL

I51complicaties en slecht omschreven hartziekten

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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