| | Healthcare Industry | Medical Billing What is the medical billing code 99284 for? Level 4 office visit. An intermediate level of complexity. typically 30 minutes. Established patient. Medical Billing - Related Articles What is the medical billing code 99284 for exactly? What is the rates of pay for a medical receptionist? How much does a OR Doctor Earn? Does a state medical card pay for vasectomy? Medical Coding Facts What Are CPT Code Modifiers? How much medical doctors earn per month?