2024 ICD-10-CM Diagnosis Code I51.4
Myocarditis, unspecified
- ICD-10-CM Code:
- I51.4
- ICD-10 Code for:
- Myocarditis, unspecified
- Is Billable?
- Yes - Valid for Submission
- Chronic Condition Indicator: [1]
- Not chronic
- Code Navigator:
I51.4 is a billable diagnosis code used to specify a medical diagnosis of myocarditis, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.
Unspecified diagnosis codes like I51.4 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.
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 Classification
Clinical Category is Myocarditis and cardiomyopathy
- CCSR Category Code: CIR005
- Inpatient Default CCSR: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
- Outpatient Default CCSR: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.
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 exertionGrade 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 symptomsGrade 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
deathImmune 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.
Tabular List of Diseases and Injuries
The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.
Inclusion Terms
Inclusion TermsThese terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Chronic (interstitial) myocarditis
- Myocardial fibrosis
- Myocarditis NOS
Type 1 Excludes
Type 1 ExcludesA type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- acute or subacute myocarditis I40
Index to Diseases and Injuries References
The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).
- - Acardiotrophia - I51.4
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.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.