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I42.9

✓ Billable

Cardiomyopathy, unspecified

Diseases of the circulatory system (I00-I99)

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Also Known As

Cardiomyopathy (primary) (secondary) NOS

⚠️ Excludes2

inherited from I42

Rules from parent category I42: Cardiomyopathy

  • • ischemic cardiomyopathy (I25.5)
  • • peripartum cardiomyopathy (O90.3)
  • • ventricular hypertrophy (I51.7)

📋 Code Instructions

from I42
  • • Code first: pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4)

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Code Information

CodeI42.9
BillableYes
ParentI42
CategoryDiseases of the circulatory system (I00-I99)
Excludes10 rule(s)
Excludes23 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)