Required Components for Established Patient E/M Services Established Patient E/Ms Require 2 of 3 components HPI 99211 Location; Quality; Severity; Duration; History of Present Illness (HPI) May not require presence of Timing; Context; Modifying factors; Review of Systems (ROS) a physician or NP/PA but Associated signs or symptoms Past Family and/or Social History (PFSH) Supervision required..