Sergey Zhitnikov, MD, FACS Top Doctor 2100 Keystone Ave Drexel Hill, Pennsylvania, 19026 Company Name: Comprehensive Bariatric Surgery Program Doctor Category: Obesity Medicine Profile Let this business know you found them on Main Line Today's Online Directories. Locations Drexel Hill 2100 Keystone Ave Drexel Hill, Pennsylvania 19026 Claim/Edit Listing