Operating acute care hospitals, behavioral health facilities, outpatient facilities and ambulatory care access points, an insurance offering, a physician network and various related services located all over the U.S. States, Washington, D.C., Puerto Rico and the United Kingdom. Position Summary: Medical Office Specialist: The Medical Office Specialist (MOS) is responsible for front desk coverage for the medical practice which includes registration, check-in, collecting co-pays, scheduling appointments, billing patients, and scanning records into EMR, reports, and correspondence.