Dr. Cheng is the current Gastroenterology Division Chief at Alta Bates Hospital and Managing Partner of the practice. She is named one of The Bay Area’s Top Doctors of 2019 Dr. Cheng graduated first in her class in 1994 from Beijing Medical University (AKA Peking University Health Science Center). She completed her internal medicine residency and gastroenterology fellowship training at the State University of New York at Buffalo. Dr. Cheng is board certified in internal medicine and gastroenterology. She is a member of American Gastroenterological Association, American Society for Gastrointestinal Endoscopy and American College of Gastroenterology. Dr. Cheng is dedicated to provide high quality consultative services in gastroenterology and liver disease, as well as comprehensive endoscopic procedures including colonoscopy, upper endoscopy and capsule endoscopy. She understands the unique needs of female patients and is fluent in Mandarin. She has been practicing gastroenterology in the bay area since 2006.
Dr. Audrey "Lisa" Arzamendi is double board-certified in internal medicine and endocrinology. Since 2012, she has specialized in diabetes, obesity and metabolism, thyroid disease (including Hashimoto's and Graves'), polycystic ovary syndrome (PCOS) and sex hormone disorders, adrenal and pituitary dysfunction, osteoporosis, parathyroid/calcium disorders, and thyroid and parathyroid nodules and cancers. She is highly trained in ultrasound-guided fine-needle aspiration (FNA) biopsy of the thyroid (99% diagnostic rate).
Dr. Arzamendi is committed to safe and established medical treatments, and prides herself on staying informed about emerging therapies and research-supported non-prescription options. She is experienced working with all forms of brand-name and generic thyroid medications, and as a type 1 diabetic herself, has first-hand knowledge of nearly all available prescription and technological diabetic treatments, to best support patients in selecting their optimal diabetes treatment regimens.
Dr. Arzamendi graduated with honors from Stanford University, with a BA in Human Biology and a concentration in Health & Human Performance. She attended UC San Diego School of Medicine (receiving a federal NIH National Cancer Institute fellowship), and completed her internal medicine residency at Kaiser Pemanente’s Santa Clara Medical Center. Her endocrinology training was completed at UC Davis Medical Center. She previously practiced in California's South Bay before relocating to open her practice in Walnut Creek in 2020. Dr. Arzamendi was a Stanford varsity athlete and still enjoys running, hiking, tennis, rowing, and other outdoor activities. She loves spending time with her husband and many pets, and looks forward to being your doctor!
Medical School: Beijing Medical University
Residency: Internal Medicine – State University of New York at Buffalo
Fellowship: Gastroenterology – State University of New York at Buffalo