ICD-9 Diagnosis Code 422.90

Acute myocarditis NOS

Diagnosis Code 422.90

ICD-9: 422.90
Short Description: Acute myocarditis NOS
Long Description: Acute myocarditis, unspecified
This is the 2014 version of the ICD-9-CM diagnosis code 422.90

Code Classification
  • Diseases of the circulatory system
    • Other forms of heart disease (420-429)
      • 422 Acute myocarditis

Information for Medical Professionals

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The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • I40.9 - Acute myocarditis, unspecified

Index of Diseases and Injuries
References found for the code 422.90 in the Index of Diseases and Injuries:

Information for Patients


Also called: Dilated cardiomyopathy, Hypertrophic cardiomyopathy, Myocardiopathy, Restrictive cardiomyopathy

Cardiomyopathy is the name for diseases of the heart muscle. These diseases enlarge your heart muscle or make it thicker and more rigid than normal. In rare cases, scar tissue replaces the muscle tissue.

Some people live long, healthy lives with cardiomyopathy. Some people don't even realize they have it. In others, however, it can make the heart less able to pump blood through the body. This can cause serious complications, including

  • Heart failure
  • Abnormal heart rhythms
  • Heart valve problems
  • Sudden cardiac arrest

Heart attacks, high blood pressure, infections, and other diseases can all cause cardiomyopathy. Some types of cardiomyopathy run in families. In many people, however, the cause is unknown. Treatment might involve medicines, surgery, other medical procedures, and lifestyle changes.

NIH: National Heart, Lung, and Blood Institute

  • Cardiac catheterization
  • Cardiac catheterization - discharge
  • Cardiomyopathy
  • Dilated cardiomyopathy
  • Electrocardiogram
  • Hypertrophic cardiomyopathy
  • Myocardial biopsy
  • Myocarditis
  • Peripartum cardiomyopathy
  • Restrictive cardiomyopathy

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