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ICD-10 diagnosis code

I40.9 Acute myocarditis, unspecified

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I40.9 is the ICD-10 code for Acute myocarditis, unspecified. It is a four-character subcategory of I40 (Acute myocarditis), the most specific level in the WHO edition. It belongs to the block I30–I52 (Other forms of heart disease) in Chapter IX, Diseases of the circulatory system.

Code type
Subcategory (4 characters)
Chapter
IX · I00–I99
Classification
WHO ICD-10, 2019 version

I40.9 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

I40.9Akut myokardit, ospecificerad

NorwayICD-10-NO

I40.9Uspesifisert akutt myokarditt

DenmarkICD-10-DK

DI409Akut myokarditis UNS

FinlandICD-10-FI

I40.9Määrittämätön akuutti sydänlihastulehdus

GermanyICD-10-GM

I40.9Akute Myokarditis, nicht näher bezeichnet

FranceICD-10-FR

I40.9Myocardite aigüe, sans précision

NetherlandsICD-10-NL

I40.9acute myocarditis, niet-gespecificeerd

United StatesICD-10-CM

I40.9Acute myocarditis, 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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