Which code is not associated with high complexity medical decision making?

The code that is not associated with high complexity medical decision making is 99243. This code is used for an office or other outpatient visit for evaluation and management of an established patient, and it specifically represents a visit that typically involves a low to moderate level of complexity in medical decision making.

In contrast, the other codes listed are associated with higher complexity. For example, 99215 is used for established patients and indicates a visit requiring a high level of complexity in medical decision making. 99219 is an inpatient code that also reflects higher complexity, often involving critical care scenarios. The code I21.3 refers to a specific diagnosis in the ICD-10 system, which is related to myocardial infarctions and does not pertain directly to the complexity of medical decision making, but rather to a serious medical condition that typically involves higher complexity in its management.

Understanding the levels of medical decision making is crucial for coding and billing accurately in healthcare, as it reflects patient care complexity and ensures proper reimbursement for services provided.