Posted 12:10:37 AM. Position SummaryOrthopedic Knee & Hip Surgery Physician Assistant Opportunity at MedStar UnionSee this and similar jobs. 2 salaries reported Certified Medical Assistant $12.96 per hour One salary reported Clinical Assistant $33,793 per year 4 salaries reported Clinical Dietitian $64,748 per year One salary reported Clinical Specialist $99,118 per year One salary reported Clinical Supervisor $85,525 per year One salary reported Clinical Technician $38,150 per year.