I51 – Complications and ill-defined descriptions of heart disease
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I51
- Code
I51(claims format:I51)- Description
- Complications and ill-defined descriptions of heart disease
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I30-I5A Other forms of heart disease
Billable codes under I51
I51 is a header code and cannot be used on claims. Choose the most specific code:
- I51.0 – Cardiac septal defect, acquiredBillable
- I51.1 – Rupture of chordae tendineae, not elsewhere classifiedBillable
- I51.2 – Rupture of papillary muscle, not elsewhere classifiedBillable
- I51.3 – Intracardiac thrombosis, not elsewhere classifiedBillable
- I51.4 – Myocarditis, unspecifiedBillable
- I51.5 – Myocardial degenerationBillable
- I51.7 – CardiomegalyBillable
- I51.8 – Other ill-defined heart diseasesHeader (more codes below)
- I51.9 – Heart disease, unspecifiedBillable
Notes for I51
Frequently asked questions
What is ICD-10 code I51?
I51 is the ICD-10-CM code for complications and ill-defined descriptions of heart disease, in the block I30-I5A (Other forms of heart disease).
Is I51 a billable code?
No. I51 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.