ICD-10 Code for Myocardiopathy
Also indexed as (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic)
The ICD-10-CM code for myocardiopathy is I42.9 — Cardiomyopathy, unspecified. This is the code the Alphabetic Index gives for myocardiopathy 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 myocardiopathy code should you use?
The Alphabetic Index lists 13 codes under Myocardiopathy. 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 | |
| cobalt-beer | I42.6 | Alcoholic cardiomyopathy | |
| glycogen storage | E74.02 | Pompe disease | |
| hypertrophic obstructive | I42.1 | Obstructive hypertrophic cardiomyopathy | |
| obscure | I42.89 | Other cardiomyopathies not elsewhere classified | |
| secondary | I42.9 | Cardiomyopathy, unspecified | |
| thyrotoxic | E05.90 | Thyrotoxicosis, unspecified without thyrotoxic crisis or storm | |
| toxic NEC | I42.7 | Cardiomyopathy due to drug and external agent |
Myocardiopathy in
Myocardiopathy thyrotoxic
| with 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