Diagnosis Code

I40.9 ACUTE MYOCARDITIS, UNSPECIFIED


Code Information

Diagnosis Code: I40.9

Short Description: Acute myocarditis, unspecified

Long Description: Acute myocarditis, unspecified

The code I40.9 is VALID for claim submission

Code Classification:

  • Diseases of the circulatory system (I00–I99)
    • Other forms of heart disease (I30-I5A)
      • Acute myocarditis (I40)
        • I40.9 Acute myocarditis, unspecified

Code Version: 2022 ICD-10-CM


Synonyms

  • Acute myocarditis
  • Interstitial myocarditis
  • Subacute interstitial myocarditis

Diagnostic Related Group(s)

The code I40.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v39.0)
  • Other Circulatory System Diagnoses With Mcc (314)
  • Other Circulatory System Diagnoses With Cc (315)
  • Other Circulatory System Diagnoses Without Cc/mcc (316)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
I40.9 Right Arrow 422.90 Acute myocarditis NOS

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
I40 Acute myocarditis
I40.0 Infective myocarditis
I40.1 Isolated myocarditis
I40.8 Other acute myocarditis


This page was last updated on: 10/1/2023