2024 ICD-10-CM Diagnosis Code I51.4

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

• Acute HIV infection
• Acute myocarditis
• Chronic interstitial myocarditis
• Chronic myocarditis
• Fibroid myocarditis
• Heart disease co-occurrent with human immunodeficiency virus infection
• Heart disease co-occurrent with human immunodeficiency virus infection
• Heart disease due to ionizing radiation
• Heart failure with normal ejection fraction
• Heart failure with reduced ejection fraction
• Heart failure with reduced ejection fraction due to myocarditis
• Interstitial myocarditis
• Left ventricular failure with normal ejection fraction due to myocarditis
• Lymphocytic myocarditis
• Myocardial dysfunction with sepsis
• Myocarditis
• Myocarditis co-occurrent with human immunodeficiency virus infection
• Myocarditis due to physical agent
• Myocarditis due to physical agent
• Myocarditis due to radiation
• Myocarditis with AIDS
• Senile myocarditis

Clinical Information

• Chagas Cardiomyopathy

  a disease of the cardiac muscle developed subsequent to the initial protozoan infection by trypanosoma cruzi. after infection, less than 10% develop acute illness such as myocarditis (mostly in children). the disease then enters a latent phase without clinical symptoms until about 20 years later. myocardial symptoms of advanced chagas disease include conduction defects (heart block) and cardiomegaly.

• Myocarditis

  inflammatory processes of the muscular walls of the heart (myocardium) which result in injury to the cardiac muscle cells (myocytes, cardiac). manifestations range from subclinical to sudden death (death, sudden). myocarditis in association with cardiac dysfunction is classified as inflammatory cardiomyopathy usually caused by infection, autoimmune diseases, or responses to toxic substances. myocarditis is also a common cause of dilated cardiomyopathy and other cardiomyopathies.

• Acute Myocardial Injury with Myocarditis Related to COVID-19|Acute myocardial injury with myocarditis

  acute myocardial injury with clinical, imaging, and or pathology evidence supporting myocarditis in a patient with probable or confirmed acute covid-19.

• Acute Myocardial Injury without Ischemia, Heart Failure, Ventricular Dysfunction, or Myocarditis Related to COVID-19|Acute myocardial injury without ischemia, HF, ventricular dysfunction, or myocarditis

  acute myocardial injury, without evidence of acute ischemia, heart failure, a newly reduced left or right ventricular ejection fraction, cardiogenic shock, or myocarditis in a patient with probable or confirmed acute covid-19.

• Acute Myocarditis

  the sudden onset of inflammation of heart muscle with myocellular necrosis; this is generally secondary to an infectious cause, and patients often have a recent history of a flu-like illness.

• Acute Rheumatic Myocarditis

  inflammation of the myocardium in acute rheumatic heart disease.

• Bacterial Myocarditis

  myocarditis that is caused by an infection with a bacterial agent.

• Giant Cell Myocarditis

  an often fatal inflammatory disorder that affects the myocardium. morphologically, it is characterized by the presence of an inflammatory infiltrate in the myocardial tissue that includes multinucleated giant cells. it is often associated with the presence of an autoimmune disorder. patients present with arrhythmias and/or heart failure. heart transplantation is the only treatment option available.

• Grade 2 Myocarditis, CTCAE|Grade 2 Myocarditis

  symptoms with moderate activity or exertion

• Grade 3 Myocarditis, CTCAE|Grade 3 Myocarditis|Grade 3 Myocarditis

  severe with symptoms at rest or with minimal activity or exertion; intervention indicated; new onset of symptoms

• Grade 4 Myocarditis, CTCAE|Grade 4 Myocarditis|Grade 4 Myocarditis

  life-threatening consequences; urgent intervention indicated (e.g., continuous iv therapy or mechanical hemodynamic support)

• Grade 5 Myocarditis, CTCAE|Grade 5 Myocarditis|Grade 5 Myocarditis

  death

• Immune Checkpoint Inhibitor-related Myocarditis|ICI-MC

  myocarditis associated with the therapeutic use of an immune checkpoint inhibitor.

• Interstitial Myocarditis

  inflammation of the heart characterized by infiltration of the interstitial tissues by inflammatory cells, histiocytes, and the formation of granulomas. giant cells are often present.

• Myocarditis

  inflammation of the muscle tissue of the heart.

• Myocarditis, CTCAE 5.0|Myocarditis|Myocarditis

  a disorder characterized by inflammation of the muscle tissue of the heart.

• Viral Myocarditis|Myocarditis

  myocarditis that is caused by an infection with a viral agent.

I51.4 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
314	OTHER CIRCULATORY SYSTEM DIAGNOSES WITH MCC	05	2.0935
315	OTHER CIRCULATORY SYSTEM DIAGNOSES WITH CC	05	0.9673
316	OTHER CIRCULATORY SYSTEM DIAGNOSES WITHOUT CC/MCC	05	0.6927

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Convert I51.4 to ICD-9-CM

• ICD-9-CM Code: 429.0 - Myocarditis NOS

Patient Education

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 (SCA)

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

[Learn More in MedlinePlus]

Code History

• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
• FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
• FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
• FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
• FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
• FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
• FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.