Wisconsin ambulatory surgery facility charges (prices) for 2018 for each hospital and freestanding ambulatory surgery center How much does outpatient surgery cost in WI? Scroll to bottom of page for Chapters VI and VII Ambulatory Surgery. Find average 2018 charges for 20 common ambulatory surgery procedures, such as Colonoscopy (6 codes), Endoscopy, Biopsy, Spinal Injection, Cataract & Lens ($7,439 hospital average), outpatient Knee surgery/arthroscopy ($11,699), Carpal Tunnel ($6,548), Ear Tubes, and more. Volumes for each hospital and surgical center are shown for top 20 only. Go to Table 28 in Chapter VI for a longer list of 40 procedures including colonoscopy & biopsy, code 45380 ($5,478 average) and gall bladder removal (laparoscopic cholecystectomy at $18,389). Chapter VII compares average prices (along with median charge and number of cases) at each hospital and surgery center for twenty 2018 ambulatory surgeries. Prices do NOT include surgeon and physician fees, which may cost thousands of dollars and could double prices shown. Consumers should add medical inflation to estimate 2019 facility prices. Health Care Data Report 2018 published by WHA Information Center September 2019.