Medical billing code 99214 is used for office or outpatient visits by established patients. Visits must require two of the following components to qualify for 99214 coding: a detailed history, a detailed examination or complex medical decision making.
A similar visit for a new patient is coded as 99204. In these visits, all three of the 99214 criteria must be met. Less complex outpatient or office visits are coded as 99213 for established patients and 99203 for new patients.
99203 and 99213 are classified as level-3 visits, and 99204 and 99214 are classified as level-4 visits. Level-4 visits are more expensive than level-3 visits.