ICD-10-CM Diagnosis Code I43 - Cardiomyopathy in diseases classified elsewhere (original) (raw)

ICD List Logo

ICD List 2025-2026 Edition

  1. Home
  2. ICD-10-CM Codes
  3. I00–I99
  4. I30-I5A
  5. I43
  6. 2026 ICD-10-CM Code I43

Cardiomyopathy in diseases classified elsewhere

ICD-10-CM Code:

I43

ICD-10 Code for:

Cardiomyopathy in diseases classified elsewhere

Is Billable?

Yes - Valid for Submission

Chronic Condition Indicator: [1]

Chronic

Code Navigator:

I43 is a billable diagnosis code used to specify a medical diagnosis of cardiomyopathy in diseases classified elsewhere. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

  1. Code Information
  2. Approximate Synonyms
  3. Clinical Classification
  4. Clinical Information
  5. Tabular List of Diseases and Injuries
  6. Code Edits
  7. Diagnostic Related Groups Mapping
  8. Convert to ICD-9 Code
  9. Patient Education
  10. Code History

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

CCSR Code: CIR005

Inpatient Default: X - Not applicable.

Outpatient Default: X - Not applicable.

a condition characterized by the thickening of the ventricular endocardium and subendocardium (myocardium), seen mostly in children and young adults in the tropical climate. the fibrous tissue extends from the apex toward and often involves the heart valves causing restrictive blood flow into the respective ventricles (cardiomyopathy, restrictive).

a disease characterized by fibrotic thickening of the endocardium, particularly the right and/or left inflow tracts. the disease often involves the atrioventricular valves, leading to valvular regurgitaion. it most commonly occurs in children living within 15 degrees of the equator.

degeneration of myocardial tissue.

The Medicare Code Editor (MCE) detects errors and inconsistencies in ICD-10-CM diagnosis coding that can affect Medicare claim validity. These Medicare code edits help medical coders and billing professionals determine when a diagnosis code is not appropriate as a principal diagnosis, does not meet coverage criteria. Use this list to verify whether a code is valid for Medicare billing and to avoid claim rejections or denials due to diagnosis coding issues.

Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

ICD-9-CM: 425.8

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

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 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]