Beyond enabling easier health care access for their employees, studies have found that on-site health care clinics can also lower medical costs for companies, encourage better long-term employee health, reduce absenteeism, and improve productivity, according to non-profit insurer The Alliance. On-site clinic capabilities vary by employer, and services range from last-minute appointments for a sinus infection to an annual physical by a primary care physician or even ongoing wellness options like a dietician or physical therapist.