Valid for Submission
I40.9 is a billable diagnosis code used to specify a medical diagnosis of acute myocarditis, unspecified. The code I40.9 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code I40.9 might also be used to specify conditions or terms like acute myocarditis, interstitial myocarditis or subacute interstitial myocarditis.
Unspecified diagnosis codes like I40.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I40.9 are found in the index:
- - Myocarditis (with arteriosclerosis) (chronic) (fibroid) (interstitial) (old) (progressive) (senile) - I51.4
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Acute myocarditis
- Interstitial myocarditis
- Subacute interstitial myocarditis
Diagnostic Related Groups - MS-DRG Mapping
Convert I40.9 to ICD-9 Code
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
- Cardiomyopathy (Medical Encyclopedia)
- Dilated cardiomyopathy (Medical Encyclopedia)
- Electrocardiogram (Medical Encyclopedia)
- Hypertrophic cardiomyopathy (Medical Encyclopedia)
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