What is cpt code 99220?

99220 - Office or other outpatient visit for the evaluation and management of an established patient, that typically requires a medically appropriate history and/or examination and decision-making of moderate complexity. Using problem-focused interval history; 10 minutes

A 99220 code means that the physician spent 10-19 minutes face-to-face with a patient who is considered established. This is typically used for follow-up visits or check-ins on an ongoing condition.