DATA SOURCES: Articles describing practice variation, health care financing and reimbursement, shared decision making, cost effective health care delivery, patient reported outcome measures, social determinants of health, and screening. ...Although evidence suggests that shared decision making and addressing social determinants of health have critical roles in high quality care, some practices such as routine laboratory screening for urticaria, premedication to prevent recurrent low or iso osmolar contrast reactions, extended observation of resolved anaphylaxis, food allergy screening, and penicillin allergy overdiagnosis have high costs in relation to overall societal benefit. ...