Valid for Submission
I20.0 is a billable diagnosis code used to specify a medical diagnosis of unstable angina. The code I20.0 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code I20.0 might also be used to specify conditions or terms like angina control, angina control - worsening, chronic chest pain, chronic ischemic heart disease, impending infarction , preinfarction syndrome, etc.
The code is commonly used in cardiology medical specialties to specify clinical concepts such as chest pain.
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 I20.0:
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.
- Accelerated angina
- Crescendo angina
- De novo effort angina
- Intermediate coronary syndrome
- Preinfarction syndrome
- Worsening effort angina
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 I20.0 are found in the index:
- - Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) - I20.9
- - unstable - I20.0
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Angina control
- Angina control - worsening
- Chronic chest pain
- Chronic ischemic heart disease
- Impending infarction
- Preinfarction syndrome
- Progressive angina
- Refractory angina
- ANGINA UNSTABLE-. precordial pain at rest which may precede a myocardial infarction.
Convert I20.0 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code I20.0 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
Angina is chest pain or discomfort you feel when there is not enough blood flow to your heart muscle. Your heart muscle needs the oxygen that the blood carries. Angina may feel like pressure or a squeezing pain in your chest. It may feel like indigestion. You may also feel pain in your shoulders, arms, neck, jaw, or back.
Angina is a symptom of coronary artery disease (CAD), the most common heart disease. CAD happens when a sticky substance called plaque builds up in the arteries that supply blood to the heart, reducing blood flow.
There are three types of angina:
- Stable angina is the most common type. It happens when the heart is working harder than usual. Stable angina has a regular pattern. Rest and medicines usually help.
- Unstable angina is the most dangerous. It does not follow a pattern and can happen without physical exertion. It does not go away with rest or medicine. It is a sign that you could have a heart attack soon.
- Variant angina is rare. It happens when you are resting. Medicines can help.
Not all chest pain or discomfort is angina. If you have chest pain, you should see your health care provider.
NIH: National Heart, Lung, and Blood Institute
- Angina - discharge (Medical Encyclopedia)
- Angina - when you have chest pain (Medical Encyclopedia)
- Coronary angiography (Medical Encyclopedia)
- Electrocardiogram (Medical Encyclopedia)
- Living with heart disease and angina (Medical Encyclopedia)
- Stable angina (Medical Encyclopedia)
- Unstable angina (Medical Encyclopedia)
[Learn More in MedlinePlus]