Revenue cycle management (RCM) tracks patient care from registration to final payment. It involves providers, payers, patients, and billing companies. Medicare and Medicaid are government insurance programs managed by CMS. Health insurance covers regular checkups, vision, dental, and hospitals. Medicare has four parts that cover different services like inpatient care, outpatient care, and prescription drugs. Medical coding translates diagnoses, procedures, and services into codes to facilitate billing and data analysis. The revenue cycle includes steps like entering patient demographics, medical coding, charge entry, payment posting, accounts receivable management, and patient billing.