I42.7 is the authoritative medical code for Cardiomyopathy due to drug and external agent. This classification is used in medical billing and clinical recording to specify the clinical criteria for cardiomyopathy due to drug and external agent (ICD-10-CM I42.7), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Cardiomyopathy due to drug and external agent is a billable ICD-10-CM diagnosis code I42.7. Includes: myocardiopathy. Excludes2 (not included here): ischemic cardiomyopathy I25.5; peripartum cardiomyopathy O90.3; ventricular hypertrophy I51.7. Code first: poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4); pre-existing cardiomyopathy complicating pregnancy and puerperium O99.4. Use additional code: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for I42.7 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- ischemic cardiomyopathy I25.5
- peripartum cardiomyopathy O90.3
- ventricular hypertrophy I51.7
Code First
Underlying conditions that must be sequenced before this code.
- poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4)
- pre-existing cardiomyopathy complicating pregnancy and puerperium O99.4
Use Additional Code
Supplementary codes the tabular list directs you to add.
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Frequently Asked Questions (FAQ) & Clinical Guidance
Can I42.7 be reported alongside related conditions?
Per Excludes2 instructions, I42.7 and the following may both be reported when both are present: ischemic cardiomyopathy (I25.5); peripartum cardiomyopathy (O90.3); ventricular hypertrophy (I51.7).
Does I42.7 need to be sequenced after another code?
Yes. Code first: poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4); pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4).
Is an additional code needed with I42.7?
Use additional code(s) to specify: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
Codes in This Family (10)
Official ICD-10-CM classifications in the same code family as I42.7, with their registry titles.
- I42 — Cardiomyopathy
- I42.0 — Dilated cardiomyopathy
- I42.1 — Obstructive hypertrophic cardiomyopathy
- I42.2 — Other hypertrophic cardiomyopathy
- I42.3 — Endomyocardial (eosinophilic) disease
- I42.4 — Endocardial fibroelastosis
- I42.5 — Other restrictive cardiomyopathy
- I42.6 — Alcoholic cardiomyopathy
- I42.8 — Other cardiomyopathies
- I42.9 — Cardiomyopathy, unspecified
Indexed Clinical Terms (4)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Cardiomyopathy (familial) (idiopathic), due to, drugs
- Cardiomyopathy (familial) (idiopathic), due to, external agents NEC
- Cardiomyopathy (familial) (idiopathic), toxic NEC
- Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic), toxic NEC
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: