What is the ICD-10 code for hypertrophic cardiomyopathy?

The ICD-10 code for obstructive hypertrophic cardiomyopathy is I42.1, while nonobstructive hypertrophic cardiomyopathy is coded as I42.2.

How do you code hypertrophic cardiomyopathy with heart failure?

Code heart failure first (I50.xx) if it is the primary reason for the encounter, followed by the specific HCM code (I42.1 or I42.2).

ICD-10 Coding for Hypertrophic Cardiomyopathy(I42.1, I42.2, I42.9)

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Comprehensive guide on ICD-10 coding for hypertrophic cardiomyopathy, including documentation requirements, coding pitfalls, and billing considerations.

Also known as:

HCMIdiopathic Hypertrophic Subaortic StenosisAsymmetric Septal Hypertrophy

Related ICD-10 Code Ranges

Complete code families applicable to Hypertrophic Cardiomyopathy

I00-I99Primary Range

Diseases of the circulatory system

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
I42.1	Obstructive hypertrophic cardiomyopathy	Use when there is documented obstruction in the left ventricular outflow tract.	LV wall thickness ≥15 mm Systolic anterior motion of the mitral valve Resting LVOT gradient ≥30 mmHg
I42.2	Nonobstructive hypertrophic cardiomyopathy	Use when hypertrophy is present without LVOT obstruction.	LV wall thickness ≥15 mm No significant LVOT obstruction

Primary ICD-10-CM Codes

Obstructive hypertrophic cardiomyopathy

I42.1Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Nonobstructive hypertrophic cardiomyopathyI42.2

Obstructive hypertrophic cardiomyopathyI42.1

Documentation & Coding Risks

Avoid these common issues when documenting Hypertrophic Cardiomyopathy.

Vague documentation of cardiomyopathy.

Impact

Clinical: May lead to inappropriate treatment decisions., Regulatory: Non-compliance with documentation standards., Financial: Potential for claim denials.

Mitigation

Use specific terms like 'obstructive' or 'nonobstructive'., Include detailed echocardiogram results.

Using unspecified codes like I42.9

Impact

Reimbursement: May lead to claim denials or reduced payment., Compliance: Non-compliance with coding guidelines., Data Quality: Impacts the accuracy of clinical data.

Mitigation

Always specify whether the HCM is obstructive or nonobstructive.

Unspecified Cardiomyopathy Codes

Impact

High denial rates for claims using unspecified codes.

Mitigation

Ensure specific documentation and coding of HCM type.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with I42.1.

Primary Code

I42.1

Obstructive hypertrophic cardiomyopathy

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ICD-10 codes5

Coding risks3

FAQs2

ICD-10 Coding for Hypertrophic Cardiomyopathy(I42.1, I42.2, I42.9)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for hypertrophic cardiomyopathy?

How do you code hypertrophic cardiomyopathy with heart failure?

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