ICD-10 Code for Cardiomyopathy
The default ICD-10-CM 2027 code for cardiomyopathy (familial) (idiopathic) is I42.9 – Cardiomyopathy, unspecified. More specific codes depend on the details documented, as listed in the official index (33 codes, 33 billable).
- Main code
I42.9– Cardiomyopathy, unspecified- Billable
- Yes
Index entries for Cardiomyopathy
- alcoholic –
I42.6 - amyloid –
E85.4–I43[manifestation] - arrhythmogenic –
I42.81 - arteriosclerotic – see Disease, heart, ischemic, atherosclerotic
- beriberi –
E51.12 - cobalt-beer –
I42.6 - congenital –
I42.4 - congestive –
I42.00 - constrictive NOS –
I42.5 - dilated –
I42.00 - due to
- alcohol –
I42.6 - beriberi –
E51.12 - cardiac glycogenosis –
E74.02–I43[manifestation] - drugs –
I42.7 - external agents NEC –
I42.7 - Friedreich's ataxia –
G11.11 - myotonia atrophica –
G71.11–I43[manifestation] - progressive muscular dystrophy –
G71.09–I43[manifestation] – see also Dystrophy, muscular, by type
- alcohol –
- glycogen storage –
E74.02–I43[manifestation] - hypertensive – see Hypertension, heart
- hypertrophic (nonobstructive) –
I42.2 - in
- ischemic –
I25.5 - metabolic –
E88.9–I43[manifestation] - newborn –
I42.89- congenital –
I42.4
- congenital –
- non-ischemic –
I42.89– see also by cause - nutritional –
E63.9–I43[manifestation]- beriberi –
E51.12
- beriberi –
- obscure of Africa –
I42.89 - peripartum –
O90.3 - postpartum –
O90.3 - restrictive NEC –
I42.5 - rheumatic –
I09.0 - secondary –
I42.9 - specified NEC –
I42.89 - stress induced –
I51.81 - takotsubo –
I51.81 - thyrotoxic –
E05.90–I43[manifestation] - toxic NEC –
I42.7 - transthyretin-related (ATTR) –
E85.4 - tuberculous –
A18.84 - viral –
B33.24
How to choose the right code
Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.
Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.