2026 ICD-10-CM Diagnosis Code I42.6Alcoholic cardiomyopathy

ICD-10-CM Codes›I00–I99›I30-I5A›I42

ICD-10-CM I42.6
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I42.6 is a billable ICD-10-CM diagnosis code for alcoholic cardiomyopathy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 314 through 316. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Alcohol-related disorders and Myocarditis and cardiomyopathy.

Code Identity

ICD-10-CM Code
I42.6
Billable Status
Yes — Valid for Submission
Code Describes
Alcoholic cardiomyopathy
Short Description
Alcoholic cardiomyopathy
Same as the full description in the CMS dataset.
Parent Code
I42
Cardiomyopathy

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI42Cardiomyopathy
This CodeI42.6Alcoholic cardiomyopathy

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Alcoholic cardiomyopathy
  • Cardiomyopathy caused by drug
  • Dilated cardiomyopathy caused by drug
  • Toxic cardiomyopathy
  • Toxic dilated cardiomyopathy

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Code Also

  • presence of alcoholism F10

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Alcohol, alcoholic, alcohol-induced
      • cardiopathy
    • Beer drinker's heart(disease)
    • Cardiomyopathy(familial) (idiopathic)
      • alcoholic
    • Cardiomyopathy(familial) (idiopathic)
      • cobalt-beer
    • Cardiomyopathy(familial) (idiopathic)
      • due to
        • alcohol
    • Disease, diseased
      • heart (organic)
        • beer drinkers'
    • Myocardiopathy(congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic)
      • alcoholic
    • Myocardiopathy(congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic)
      • cobalt-beer

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD017
Alcohol-related disorders
Default principal diagnosis: inpatient No · outpatient No
CCSR CIR005
Myocarditis and cardiomyopathy
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Alcohol Use Disorder (AUD)

For most adults, moderate alcohol use is probably not harmful. Your risk of developing an alcohol use disorder (AUD) depends on how much, how often, and how quickly you drink alcohol. Alcohol misuse means that drinking causes distress and harm. Over time alcohol misuse can increase your risk of AUD.

The full article covers:

  • What is alcohol use disorder (AUD)?
  • What is binge drinking?
  • What are the dangers of too much alcohol?
  • How do I know if I have an alcohol use disorder (AUD)?
  • What should I do if I think that I might have an alcohol use disorder (AUD)?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert I42.6 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
425.5 Alcoholic cardiomyopathy
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I42.6Overview

Is I42.6 (Cardiomyopathy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report alcoholic cardiomyopathy on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I42.6 group to?

When alcoholic cardiomyopathy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I42.6?

Under the General Equivalence Mappings, alcoholic cardiomyopathy converts to ICD-9-CM 425.5 (alcoholic cardiomyopathy). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.