Final answer:
In medical coding, it is assumed that coronary artery disease (CAD) and angina involve native arteries unless specified otherwise. CAD leads to reduced blood flow due to plaque in the coronary arteries, with angina as a common symptom. Correct documentation is essential for accurate diagnosis and coding.
Step-by-step explanation:
When coding for coronary artery disease (CAD) and angina, it is generally assumed that the condition involves the native arteries unless there is specific documentation indicating otherwise. CAD, also known as coronary heart disease (CHD) or ischemic heart disease (IHD), typically refers to the obstruction or reduction of blood flow due to plaque build-up in the coronary arteries that supply the heart muscle with oxygen-rich blood. This disease can manifest in various forms including stable and unstable angina, myocardial infarction, and even sudden cardiac death. The typical symptom of CAD, angina, is characterized by chest pain or discomfort that may be precipitated by exercise or stress and relieved with rest. Adequate documentation is crucial in accurately diagnosing and coding for various cardiovascular conditions, as the specific arteries affected may alter the course of treatment and reimbursement.