Hans Schoellhammer, M.D., is a surgical oncologist and melanoma expert at City of Hope.

Heather Player, M.D., is breast and colon cancer surgeon and an assistant clinical professor in the Division of Surgical Oncology at City of Hope. She practices at City of Hope | Antelope Valley and Mission Hills.

Dr. Shabatian graduated with summa cum laude honors from UCLA, and obtained his Master's and Medical degrees from the Chicago Medical School. Dr. Shabatian performed his first weight loss surgery procedure at the Loyola University Medical Center in Chicago back 2002. He became profoundly impressed with the life-changing results that weight loss procedures can bring to patients. Dr. Shabatian focused his attention and skill to treating overweight patients through. Dr. Hooman Shabatian is a Board-Certified Surgeon and a member of the American College of Surgeons, and specializes in Minimally Invasive and Robotic Surgery, including Robotic Sleeve Gastrectomy and Gastric Balloon placement.

West Medical in Lancaster, CA specializes in a variety of services ranging from weight loss surgery and weight loss procedures to varicose vein treatment. Conveniently located right off of the Antelope Valley Freeway, many patients choose the surgeons and specialists from the West Medical Lancaster location for their surgeries and treatments. This is especially true for patients looking for laparoscopic sleeve gastrectomy in Lancaster, Valencia, and Quartz Hill. Patients of our Lancaster West Medical location will find that we practice the best and most innovative treatments in medicine today, conveniently located close to home.

Yih-Dar Nien, M.D., is a cancer surgeon at City of Hope's Antelope Valley and Santa Clarita locations.