FY2027
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ICD-10 Code for Cardiomyopathy

Also indexed as (familial) (idiopathic)

The ICD-10-CM code for cardiomyopathy is I42.9 — Cardiomyopathy, unspecified. This is the code the Alphabetic Index gives for cardiomyopathy with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).

BillableUnspecified

I42.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.

Which cardiomyopathy code should you use?

The Alphabetic Index lists 33 codes under Cardiomyopathy. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.

By type

alcoholicI42.6Alcoholic cardiomyopathy
amyloidE85.4Organ-limited amyloidosis
arrhythmogenicI42.81Arrhythmogenic cardiomyopathy
beriberiE51.12Wet beriberi
cobalt-beerI42.6Alcoholic cardiomyopathy
congenitalI42.4Endocardial fibroelastosis
congestiveI42.00Dilated cardiomyopathy, unspecified
constrictive NOSI42.5Other restrictive cardiomyopathy
dilatedI42.00Dilated cardiomyopathy, unspecified
glycogen storageE74.02Pompe disease
hypertrophicI42.2Other hypertrophic cardiomyopathy
ischemicI25.5Ischemic cardiomyopathy
metabolicE88.9Metabolic disorder, unspecified
newbornI42.89Other cardiomyopathies not elsewhere classified
non-ischemicI42.89Other cardiomyopathies not elsewhere classified
nutritionalE63.9Nutritional deficiency, unspecified
obscure of AfricaI42.89Other cardiomyopathies not elsewhere classified
peripartumO90.3Peripartum cardiomyopathy
postpartumO90.3Peripartum cardiomyopathy
restrictive NECI42.5Other restrictive cardiomyopathy
rheumaticI09.0Rheumatic myocarditis
secondaryI42.9Cardiomyopathy, unspecified
specified NECI42.89Other cardiomyopathies not elsewhere classified
stress inducedI51.81Takotsubo syndrome
takotsuboI51.81Takotsubo syndrome
thyrotoxicE05.90Thyrotoxicosis, unspecified without thyrotoxic crisis or storm
toxic NECI42.7Cardiomyopathy due to drug and external agent
transthyretin-related familial amyloidE85.4Organ-limited amyloidosis
tuberculousA18.84Tuberculosis of heart
viralB33.24Viral cardiomyopathy

Cardiomyopathy amyloid

transthyretin-related familialE85.4Organ-limited amyloidosis

Cardiomyopathy arrhythmogenic

biventricularI42.81Arrhythmogenic cardiomyopathy
ventricularI42.81Arrhythmogenic cardiomyopathy

Cardiomyopathy dilated

familial-geneticI42.01Familial-genetic dilated cardiomyopathy
specified NECI42.09Other dilated cardiomyopathy

Cardiomyopathy due to

alcoholI42.6Alcoholic cardiomyopathy
beriberiE51.12Wet beriberi
cardiac glycogenosisE74.02Pompe disease
drugsI42.7Cardiomyopathy due to drug and external agent
external agents NECI42.7Cardiomyopathy due to drug and external agent
Friedreich's ataxiaG11.11Friedreich ataxia
myotonia atrophicaG71.11Myotonic muscular dystrophy
progressive muscular dystrophyG71.09Other specified muscular dystrophies

Cardiomyopathy hypertrophic

obstructiveI42.1Obstructive hypertrophic cardiomyopathy
obstructive › congenitalQ24.8Other specified congenital malformations of heart

Cardiomyopathy in

Chagas' diseaseB57.2Chagas' disease (chronic) with heart involvement
sarcoidosisD86.85Sarcoid myocarditis
Chagas' disease › acuteB57.0Acute Chagas' disease with heart involvement

Cardiomyopathy metabolic

thyrotoxicE05.90Thyrotoxicosis, unspecified without thyrotoxic crisis or storm
thyrotoxic › with thyroid stormE05.91Thyrotoxicosis, unspecified with thyrotoxic crisis or storm

Cardiomyopathy newborn

congenitalI42.4Endocardial fibroelastosis

Cardiomyopathy nutritional

beriberiE51.12Wet beriberi

Cardiomyopathy thyrotoxic

with thyroid stormE05.91Thyrotoxicosis, unspecified with thyrotoxic crisis or storm

Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources