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Home/Diagnosis/ICD-10 Coding for Hypertrophic Cardiomyopathy

ICD-10 Coding for Hypertrophic Cardiomyopathy

I42.1
I42.2

Complete ICD-10-CM coding and documentation guide for icd-10 coding for hypertrophic cardiomyopathy includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
HCM
Idiopathic Hypertrophic Subaortic Stenosis
Asymmetric Septal Hypertrophy
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Key Information: ICD-10 Coding for Hypertrophic Cardiomyopathy

Essential facts and insights about ICD-10 Coding for Hypertrophic Cardiomyopathy

Use ICD-10 code I42.1 for obstructive hypertrophic cardiomyopathy, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Obstructive hypertrophic cardiomyopathy

Billable Code
I42.1
Billable

Diagnostic Criteria

clinical:
  • • Presence of LVOT obstruction with gradient ≥30 mmHg
documentation:
  • • Specific mention of asymmetric septal hypertrophy and SAM

Applicable To

  • • Asymmetric septal hypertrophy
  • • Left ventricular outflow tract obstruction

Important Notes

  • • Ensure documentation specifies the type of hypertrophy and presence of obstruction.

Nonobstructive hypertrophic cardiomyopathy

Billable Code
I42.2
Billable

Diagnostic Criteria

clinical:
  • • LV wall thickness ≥15 mm
  • • No significant LVOT obstruction

Applicable To

  • • Concentric hypertrophy
  • • Apical hypertrophy

Important Notes

  • • Document the type of hypertrophy and absence of obstruction.
Ancillary Codes

Additional codes that may be used with this diagnosis

I48.91

Unspecified atrial fibrillation

Use when atrial fibrillation is present with HCM.

Z84.89

Family history of other specified conditions

Use when there is a family history of sudden cardiac death.

Frequently Asked Questions

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).

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