A joint venture orthopedic surgery center being developed by Raleigh (N.C.)  Orthopaedic Clinic and Rex Healthcare, also based in Raleigh, has proposed adding two procedure rooms to its original plans for the facility at the cost of $4.3 million, according to a report by the Triangle Business Journal.

1. Orthopedics accounts for around 16 percent of the total case volume mix in surgery centers, second behind GI/endoscopy (25 percent), ophthalmology (18 percent) and pain management (17 percent). The average surgery center performs 4,869 cases annually, which would average to around 779 orthopedics cases annually.