a group practice is any relationship between three or more physicians who share facilities, expenses, profits and other resources like support staff and equipment. Group practices tend to fall into two categories: those that organize around a particular medical specialty and those that encompass several specialties like Greater Los Angeles Orthopedic that specializes in orthopedic surgery. http://www.vitals.com/group-practice/california/los-angeles/downey/greater-los-angeles-orthopedic