title: Independent centers reduce OP surgery cost.
mesh_terms: D000068:Accreditation; D001130:Arizona; D005102:Health Expenditures; D006782:Hospitals, Special; D006801:Humans; D007359:Insurance, Surgical; D006278:Medicare; D013514:Surgical Procedures, Operative; D013531:Surgicenters; D014481:United States