I51.9 ICD-10-CM Code: Heart disease, unspecified
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
I51.9Heart disease, unspecified
ICD-10-CM diagnosis code · United States clinical modification
Where I51.9 sits
- 1
Chapter 9
Diseases of the circulatory system (I00-I99)
- 2
Section
Other forms of heart disease (I30-I5A)
- 3
Category I51
Complications and ill-defined descriptions of heart disease
- 4
Code I51.9
Heart disease, unspecified
Notes for this code
Inclusion terms
No inclusion terms are listed for I51.9.
Code first
No “code first” instruction is listed for I51.9.
Use additional code
No “use additional code” instruction is listed for I51.9.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for I51.9.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for I51.9.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code I51.9 mean?
I51.9 is the FY 2027 U.S. ICD-10-CM code for “Heart disease, unspecified.”
Is I51.9 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, I51.9 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is I51.9 located in ICD-10-CM?
I51.9 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Other forms of heart disease (I30-I5A) (I30–I5A), under category I51, Complications and ill-defined descriptions of heart disease.
What coding notes are listed for I51.9?
No inclusion terms are listed for I51.9 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
