Additional findings from the study, “U.S. Physician Practices Spend Nearly Four Times as Much Money Interacting With Health Plans and Payers Than Do Their Canadian Counterparts”: On average, U.S. doctors spent 3.4 hours per week interacting with health plans while doctors in Ontario spent about 2.2 hours. Nurses and medical assistants in the U.S. spend 20.6 hours per physician per week on administrative tasks related to health plans, nearly 10 times the time spent by those in Ontario. U.S. clerical staff spend 53.1 hours per physician per week on administrative tasks related to insurance, compared with 15.9 hours in Ontario. Most of the difference comes from the time U.S. clerical staff spend on billing (45.5 hours) and obtaining prior authorizations (6.3 hours). Senior administrators in the U.S. spend much more time per physician than their Canadian counterparts on overseeing claims and billing tasks: 163.2 hours a year in the U.S. compared with 24.6 hours a year in Ontario. ### Study co-authors include Dr.