ICD-10-CM Code I51

Complications and ill-defined descriptions of heart disease

Version 2021 Non-Billable Code

Not Valid for Submission

I51 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of complications and ill-defined descriptions of heart disease. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions.

ICD-10:I51
Short Description:Complications and ill-defined descriptions of heart disease
Long Description:Complications and ill-defined descriptions of heart disease

Consider the following ICD-10 codes with a higher level of specificity:

  • I51.0 - Cardiac septal defect, acquired
  • I51.1 - Rupture of chordae tendineae, not elsewhere classified
  • I51.2 - Rupture of papillary muscle, not elsewhere classified
  • I51.3 - Intracardiac thrombosis, not elsewhere classified
  • I51.4 - Myocarditis, unspecified
  • I51.5 - Myocardial degeneration
  • I51.7 - Cardiomegaly
  • I51.8 - Other ill-defined heart diseases
  • I51.81 - Takotsubo syndrome
  • I51.89 - Other ill-defined heart diseases
  • I51.9 - Heart disease, unspecified

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code I51:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Other forms of heart disease (I30-I52)
      • Complications and ill-defined descriptions of heart disease (I51)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients


Heart Diseases

Also called: Cardiac diseases

If you're like most people, you think that heart disease is a problem for others. But heart disease is the number one killer in the U.S. It is also a major cause of disability. There are many different forms of heart disease. The most common cause of heart disease is narrowing or blockage of the coronary arteries, the blood vessels that supply blood to the heart itself. This is called coronary artery disease and happens slowly over time. It's the major reason people have heart attacks.

Other kinds of heart problems may happen to the valves in the heart, or the heart may not pump well and cause heart failure. Some people are born with heart disease.

You can help reduce your risk of heart disease by taking steps to control factors that put you at greater risk:

  • Control your blood pressure
  • Lower your cholesterol
  • Don't smoke
  • Get enough exercise

NIH: National Heart, Lung, and Blood Institute

  • Aspirin and heart disease (Medical Encyclopedia)
  • Being active when you have heart disease (Medical Encyclopedia)
  • Electrocardiogram (Medical Encyclopedia)
  • Exercise stress test (Medical Encyclopedia)
  • Heart disease - risk factors (Medical Encyclopedia)
  • Heart disease and depression (Medical Encyclopedia)
  • Understanding cardiovascular disease (Medical Encyclopedia)
  • Warning signs and symptoms of heart disease (Medical Encyclopedia)

[Learn More]