Cardiology Coding Alert

Reader Questions:

Pinpoint Correct Hypertrophic Cardiomyopathy Code

Question: My cardiologist diagnosed a patient with hypertrophic cardio­myopathy. What is this condition, and which ICD-10-CM code should I report for it?

Maine Subscriber

Answer: You have two codes to look to for hypertrophic cardiomyopathy, so you will need to double check the medical documentation for details to determine the appropriate code.

Your two choices are as follows:

  • I42.1 (Obstructive hypertrophic cardiomyopathy). This code also includes hypertrophic subaortic stenosis (idiopathic).
  • I42.2 (Other hypertrophic cardiomyopathy). This code also includes nonobstructive hypertrophic cardiomy­opathy.

Hypertrophic cardiomyopathy defined: With hypertrophic cardiomyopathy, the heart muscle thickens and grows stiffer than normal. This type of cardiomyopathy is often found in young, active people, and it is usually inherited.

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