Diagnosis Code 411.1
Information for Medical Professionals
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
- I20.0 - Unstable angina (approximate) Approximate Flag
The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
Index of Diseases and Injuries
References found for the code 411.1 in the Index of Diseases and Injuries:
- Angina (attack) (cardiac) (chest) (effort) (heart) (pectoris) (syndrome) (vasomotor) 413.9
- accelerated 411.1
- crescendo 411.1
- initial 411.1
- preinfarctional 411.1
- progressive 411.1
- unstable 411.1
- coronary syndrome 411.1
- myocardial infarction 411.1
- Infarct, infarction
- impending (myocardium) 411.1
- myocardium, myocardial (acute or with a stated duration of 8 weeks or less) (with hypertension) 410.9
- impending 411.1
- Syndrome - SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease
- acute coronary 411.1
- coronary insufficiency or intermediate 411.1
- impending coronary 411.1
- intermediate coronary (artery) 411.1
- preinfarction 411.1
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
- Acute coronary syndrome
- Angina - discharge
- Angina - when you have chest pain
- Coronary angiography
- Living with heart disease and angina
- Stable angina
- Unstable angina