Valid for Submission
I25.9 is a billable diagnosis code used to specify a medical diagnosis of chronic ischemic heart disease, unspecified. The code I25.9 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code I25.9 might also be used to specify conditions or terms like chronic ischemic heart disease, chronic myocardial ischemia, decreased myocardial ischemia compared to prior study, ekg myocardial ischemia, ekg myocardial ischemia , ekg: inferior ischemia, etc.
The code is commonly used in cardiology medical specialties to specify clinical concepts such as selected atherosclerosis, ischemia, and infarction.
Unspecified diagnosis codes like I25.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
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 coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code I25.9:
Inclusion TermsInclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Ischemic heart disease (chronic) NOS
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I25.9 are found in the index:
- - Deformity - Q89.9
- - Disease, diseased - See Also: Syndrome;
- - Ischemia, ischemic - I99.8
- - heart (chronic or with a stated duration of over 4 weeks) - I25.9
- - myocardium, myocardial (chronic or with a stated duration of over 4 weeks) - I25.9
- - supply (coronary) - See Also: Angina; - I25.9
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Chronic ischemic heart disease
- Chronic myocardial ischemia
- Decreased myocardial ischemia compared to prior study
- EKG myocardial ischemia
- EKG myocardial ischemia
- EKG: inferior ischemia
- Hibernating myocardium
- Increased myocardial ischemia compared to prior study
- Ischemic heart disease
- Ischemic myocardial dysfunction
- Mixed myocardial ischemia and infarction
- Myocardial ischemia
- Myocardial ischemia manifest on stress test status post myocardial infarction
- New myocardial ischemia compared to prior study
- Resting ischemia
- Stunned myocardium
Diagnostic Related Groups - MS-DRG Mapping
Convert I25.9 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code I25.9 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
Coronary Artery Disease
Coronary artery disease (CAD) is the most common type of heart disease. It is the leading cause of death in the United States in both men and women.
CAD happens when the arteries that supply blood to heart muscle become hardened and narrowed. This is due to the buildup of cholesterol and other material, called plaque, on their inner walls. This buildup is called atherosclerosis. As it grows, less blood can flow through the arteries. As a result, the heart muscle can't get the blood or oxygen it needs. This can lead to chest pain (angina) or a heart attack. Most heart attacks happen when a blood clot suddenly cuts off the hearts' blood supply, causing permanent heart damage.
Over time, CAD can also weaken the heart muscle and contribute to heart failure and arrhythmias. Heart failure means the heart can't pump blood well to the rest of the body. Arrhythmias are changes in the normal beating rhythm of the heart.
NIH: National Heart, Lung, and Blood Institute
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