Abida Ali Khan Md 2 Knoll North Dr Columbia, MD 21045 Phone : (410) 964-5306 Business Category Physicians & Surgeons-M.D. Frank Gross Md 2 Knoll North Dr Columbia, MD 21045 Phone : (410) 964-5306 Business Category Physicians & Surgeons-M.D. Gary Berg Md 2 Knoll North Dr Columbia, MD 21045 Phone : (410) 964-5306 Business Category Physicians & Surgeons-M.D.