Valid for Submission
I42.1 is a billable diagnosis code used to specify a medical diagnosis of obstructive hypertrophic cardiomyopathy. The code I42.1 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code I42.1 might also be used to specify conditions or terms like hypertrophic obstructive cardiomyopathy or idiopathic hypertrophic subaortic stenosis.
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code I42.1:
Inclusion TermsInclusion Terms
These 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.
- Hypertrophic subaortic stenosis (idiopathic)
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 I42.1 are found in the index:
- - Cardiomyopathy (familial) (idiopathic) - I42.9
- - Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic) - See Also: Cardiomyopathy; - I42.9
- - hypertrophic obstructive - I42.1
- - Stenosis, stenotic (cicatricial) - See Also: Stricture;
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Hypertrophic obstructive cardiomyopathy
- Idiopathic hypertrophic subaortic stenosis
Diagnostic Related Groups - MS-DRG Mapping
|MS-DRG||MS-DRG Title||MCD||Relative Weight|
|314||OTHER CIRCULATORY SYSTEM DIAGNOSES WITH MCC||05||2.0834|
|315||OTHER CIRCULATORY SYSTEM DIAGNOSES WITH CC||05||0.9752|
|316||OTHER CIRCULATORY SYSTEM DIAGNOSES WITHOUT CC/MCC||05||0.7495|
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 I42.1 to ICD-9 Code
Information for Patients
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
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