What are E&M codes in medical billing, and why are they important?

E&M codes, short for Evaluation and Management codes, are used in medical billing to classify and bill for physician services based on the complexity of the patient encounter. These codes take into account factors such as the level of history, examination, and medical decision-making involved in the visit. E&M codes are important as they determine the reimbursement rates for healthcare services and help ensure accurate and fair payment for the services provided.