ICD-10-CM
ICD-10 code for Cardiomyopathy: I42.9
The ICD-10-CM index points "Cardiomyopathy" to I42 (Cardiomyopathy), a header that is not billable. When nothing more specific is documented, the billable code is I42.9, Cardiomyopathy, unspecified.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
- I42.6alcoholic, Alcoholic cardiomyopathyBillable
- E85.4amyloid, Organ-limited amyloidosis, and I43 for the manifestationBillable
- I42.81arrhythmogenic, Arrhythmogenic cardiomyopathyBillable
- E51.12beriberi, Wet beriberiBillable
- I42.6cobalt-beer, Alcoholic cardiomyopathyBillable
- I42.4congenital, Endocardial fibroelastosisBillable
- I42.00congestive, Dilated cardiomyopathy, unspecifiedBillable
- I42.5constrictive NOS, Other restrictive cardiomyopathyBillable
- I42.00dilated, Dilated cardiomyopathy, unspecifiedBillable
- E74.02glycogen storage, Pompe disease, and I43 for the manifestationBillable
- I42.2hypertrophic (nonobstructive), Other hypertrophic cardiomyopathyBillable
- I25.5ischemic, Ischemic cardiomyopathyBillable
- E88.9metabolic, Metabolic disorder, unspecified, and I43 for the manifestationBillable
- I42.89newborn, Other cardiomyopathies not elsewhere classifiedBillable
- I42.89non-ischemic, Other cardiomyopathies not elsewhere classifiedBillable
- E63.9nutritional, Nutritional deficiency, unspecified, and I43 for the manifestationBillable
- I42.89obscure of Africa, Other cardiomyopathies not elsewhere classifiedBillable
- O90.3peripartum, Peripartum cardiomyopathyBillable
- O90.3postpartum, Peripartum cardiomyopathyBillable
- I42.5restrictive NEC, Other restrictive cardiomyopathyBillable
- I09.0rheumatic, Rheumatic myocarditisBillable
- I42.9secondary, Cardiomyopathy, unspecifiedBillable
- I42.89specified NEC, Other cardiomyopathies not elsewhere classifiedBillable
- I51.81stress induced, Takotsubo syndromeBillable
- I51.81takotsubo, Takotsubo syndromeBillable
- E05.90thyrotoxic, Thyrotoxicosis, unspecified without thyrotoxic crisis or storm, and I43 for the manifestationBillable
- I42.7toxic NEC, Cardiomyopathy due to drug and external agentBillable
- E85.4transthyretin-related (ATTR) familial amyloid, Organ-limited amyloidosisBillable
- A18.84tuberculous, Tuberculosis of heartBillable
- B33.24viral, Viral cardiomyopathyBillable
More specific codes in I42
A header groups codes and is not billed. A billable code is one you can report.
- I42CardiomyopathyHeader
- I42.0Dilated cardiomyopathyHeader
- I42.00Dilated cardiomyopathy, unspecifiedBillable
- I42.01Familial-genetic dilated cardiomyopathyBillable
- I42.09Other dilated cardiomyopathyBillable
- I42.1Obstructive hypertrophic cardiomyopathyBillable
- I42.2Other hypertrophic cardiomyopathyBillable
- I42.3Endomyocardial (eosinophilic) diseaseBillable
- I42.4Endocardial fibroelastosisBillable
- I42.5Other restrictive cardiomyopathyBillable
- I42.6Alcoholic cardiomyopathyBillable
- I42.7Cardiomyopathy due to drug and external agentBillable
- I42.8Other cardiomyopathiesHeader
- I42.81Arrhythmogenic cardiomyopathyBillable
- I42.89Other cardiomyopathies not elsewhere classifiedBillable
- I42.9Cardiomyopathy, unspecifiedBillable
Code first
The CDC tabular list says to report the code named here before this one.
From I42. A note on a category applies to every code under it.
Code first pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4)
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From I42. A note on a category applies to every code under it.
Related conditions
Related pages
- I42.9 code detailsNotes, nearby codes, CMS-HCC group
- Category I42Every code under it
- Chapter 9Diseases of the circulatory system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Cardiomyopathy?
The ICD-10-CM index points "Cardiomyopathy" to I42 (Cardiomyopathy), a header that is not billable. When nothing more specific is documented, the billable code is I42.9, Cardiomyopathy, unspecified.
Is I42.9 billable?
Yes. I42.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to I42.9?
The CDC tabular list gives 3 Excludes2 notes (may be coded together when both are documented) for I42.9 and the categories above it. They are listed on this page.
What chapter is I42.9 in?
Chapter 9. Diseases of the circulatory system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.