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I40.8

Billable

Other acute myocarditis

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Sudden inflammation of the heart muscle caused by causes other than infection, such as toxins, medications, or autoimmune conditions.

Coding Tips

  • •Document the specific cause (toxic, drug-induced, autoimmune) when possible for clarity
  • •This code is used when the cause is known but does not fit other acute myocarditis categories

Code Hierarchy

└I40Acute myocarditis└I40.8Other acute myocarditis
└I40.8Other acute myocarditis

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