2025 ICD-10-CM Diagnosis Code I42.5

by

Other restrictive cardiomyopathy

  • I42.5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM I42.5 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of I42.5 – other international versions of ICD-10 I42.5 may differ.

Applicable To

  • Constrictive cardiomyopathy NOS

The following code(s) above I42.5 contain annotation back-references

 that may be applicable to I42.5:

  • I00-I99  Diseases of the circulatory system
  • I42  Cardiomyopathy

Approximate Synonyms

  • Restrictive cardiomyopathy
  • Restrictive cardiomyopathy (heart condition)

Clinical Information

  • A disorder characterized by an inability of the ventricles to fill with blood because the myocardium (heart muscle) stiffens and loses its flexibility.
  • A form of cardiac muscle disease in which the ventricular walls are excessively rigid, impeding ventricular filling. It is marked by reduced diastolic volume of either or both ventricles but normal or nearly normal systolic function. It may be idiopathic or associated with other diseases (endomyocardial fibrosis or amyloidosis) causing interstitial fibrosis.
  • A type of heart disorder referring to the inability of the ventricles to fill with blood because the myocardium (heart muscle) stiffens and looses its flexibility. Causes include replacement of the myocardium with scar tissue, abnormal cellular infiltration of the myocardium, or deposition of a substance (e.g., amyloid) in the myocardium.

ICD-10-CM I42.5 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 314 Other circulatory system diagnoses with mcc
  • 315 Other circulatory system diagnoses with cc
  • 316 Other circulatory system diagnoses without cc/mcc

Convert I42.5 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to I42.5:

  • Cardiomyopathy (familial) (idiopathic) I42.9
    • constrictive NOS I42.5
    • restrictive NEC I42.5
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