Emergency: 119
AMDA-IMIC

I40 Acute myocarditis

Category / Non-billable header 4 subcodes

Block: Other forms of heart disease (I30-I5A)

Includes

  • subacute myocarditis

Excludes 1 (cannot be coded together)

  • acute rheumatic myocarditis (I01.2)

Subcodes

Each subcode links to a detail page with full clinical annotations.

Code Description Billable
I40..0 Infective myocarditis Yes
I40..1 Isolated myocarditis Yes
I40..8 Other acute myocarditis Yes
I40..9 Acute myocarditis, unspecified Yes

Last reviewed: September 2026