John Muir Health Walnut Creek Medical Center
John Muir Health Concord Medical Center
L. Sandy, Hughes, MD, FACOG has been with Muir OB/Gyn since 1987. He received his Doctor of Medicine degree from the University of California at Los Angeles and completed his residency training at the Harbor/UCLA Medical Center. He graduated from Stanford University with a Bachelor of Science degree in Biology with Honors. At Muir OB/Gyn he specializes in pregnancy care, including high risk pregnancies, infertility, and provides gynecologic care both in the office and operating room, specializing in minimally invasive surgical procedures including Robotic Surgery utilizing the da Vinci system. When he is not at work he is frequently found rehearsing or performing in various ensembles, singing, or playing the bass or trombone.
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: University of California Los Angeles
Internship: Harbor/UCLA Medical Center in Carson, California
Residency: Harbor/UCLA Medical Center in Carson, California