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).
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
| alcoholic | I42.6 | Alcoholic cardiomyopathy | |
| amyloid | E85.4 | Organ-limited amyloidosis | |
| arrhythmogenic | I42.81 | Arrhythmogenic cardiomyopathy | |
| beriberi | E51.12 | Wet beriberi | |
| cobalt-beer | I42.6 | Alcoholic cardiomyopathy | |
| congenital | I42.4 | Endocardial fibroelastosis | |
| congestive | I42.00 | Dilated cardiomyopathy, unspecified | |
| constrictive NOS | I42.5 | Other restrictive cardiomyopathy | |
| dilated | I42.00 | Dilated cardiomyopathy, unspecified | |
| glycogen storage | E74.02 | Pompe disease | |
| hypertrophic | I42.2 | Other hypertrophic cardiomyopathy | |
| ischemic | I25.5 | Ischemic cardiomyopathy | |
| metabolic | E88.9 | Metabolic disorder, unspecified | |
| newborn | I42.89 | Other cardiomyopathies not elsewhere classified | |
| non-ischemic | I42.89 | Other cardiomyopathies not elsewhere classified | |
| nutritional | E63.9 | Nutritional deficiency, unspecified | |
| obscure of Africa | I42.89 | Other cardiomyopathies not elsewhere classified | |
| peripartum | O90.3 | Peripartum cardiomyopathy | |
| postpartum | O90.3 | Peripartum cardiomyopathy | |
| restrictive NEC | I42.5 | Other restrictive cardiomyopathy | |
| rheumatic | I09.0 | Rheumatic myocarditis | |
| secondary | I42.9 | Cardiomyopathy, unspecified | |
| specified NEC | I42.89 | Other cardiomyopathies not elsewhere classified | |
| stress induced | I51.81 | Takotsubo syndrome | |
| takotsubo | I51.81 | Takotsubo syndrome | |
| thyrotoxic | E05.90 | Thyrotoxicosis, unspecified without thyrotoxic crisis or storm | |
| toxic NEC | I42.7 | Cardiomyopathy due to drug and external agent | |
| transthyretin-relatedfamilial amyloid | E85.4 | Organ-limited amyloidosis | |
| tuberculous | A18.84 | Tuberculosis of heart | |
| viral | B33.24 | Viral cardiomyopathy |
Cardiomyopathy amyloid
| transthyretin-relatedfamilial | E85.4 | Organ-limited amyloidosis |
Cardiomyopathy arrhythmogenic
Cardiomyopathy dilated
Cardiomyopathy due to
| alcohol | I42.6 | Alcoholic cardiomyopathy | |
| beriberi | E51.12 | Wet beriberi | |
| cardiac glycogenosis | E74.02 | Pompe disease | |
| drugs | I42.7 | Cardiomyopathy due to drug and external agent | |
| external agents NEC | I42.7 | Cardiomyopathy due to drug and external agent | |
| Friedreich's ataxia | G11.11 | Friedreich ataxia | |
| myotonia atrophica | G71.11 | Myotonic muscular dystrophy | |
| progressive muscular dystrophy | G71.09 | Other specified muscular dystrophies |
Cardiomyopathy hypertrophic
Cardiomyopathy in
Cardiomyopathy metabolic
Cardiomyopathy newborn
| congenital | I42.4 | Endocardial fibroelastosis |
Cardiomyopathy nutritional
| beriberi | E51.12 | Wet beriberi |
Cardiomyopathy thyrotoxic
| with thyroid storm | E05.91 | Thyrotoxicosis, 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