ICD-10-CM I42.1
Updated 3/12/2025
Reviewed by Nathan Liu, MD

Obstructive hypertrophic cardiomyopathy

Description

This code represents a specific type of cardiomyopathy where the heart muscle becomes abnormally thick, leading to potential obstruction of blood flow. It is important to differentiate this from other cardiomyopathies, such as dilated cardiomyopathy, which involves an enlarged heart with weakened muscle, and other variations of hypertrophic cardiomyopathy that may not cause obstruction.

Code Crosswalks

No crosswalks found.

Alternate Codes

No alternates found.

Billed With Codes

No codes found here.

Sources

We make no claims to ownership of the coding systems referenced on this platform. Codes and descriptions are produced from claims and chargemaster data available through the CMS-9915-F Transparency in Coverage Final Rule and via state or federal datasets. This service is provided solely as a reference to encourage use of these codes in our chargemaster review and automated billing tools, so that healthcare professionals can understand and correctly report these codes in their claims.

Federal and State Datasets

  • ICD-10 Files, Centers for Medicare & Medicaid Services (CMS)
  • ICD-10 (2019 Data), World Health Organization (WHO)