ICD-10-CM › I00-I99 › I30-I5A › I codes › I40

I40

Acute myocarditis

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 4 more specific codes instead:

  • I40.0 Infective myocarditis
  • I40.1 Isolated myocarditis
  • I40.8 Other acute myocarditis
  • I40.9 Acute myocarditis, unspecified

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Acute myocarditis

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Excludes1 - never coded here

  • acute rheumatic myocarditis (I01.2)

Includes

  • subacute myocarditis