Dr. Rachel Ersoff received her doctorate of Audiology at the University of Washington in Seattle in 2015. She worked in Santa Fe, New Mexico at Southwestern ENT for several years and now resides in Santa Cruz, where she diagnoses, treats, and evaluates hearing and balance disorders at Santa Cruz ENT. Dr. Ersoff is a fellow of the American Speech Language Association and licensed in California as a dispensing audiologist. She treats hearing loss with expertise in underlying medical conditions such as Meniere’s Disease, otosclerosis, noise trauma, eustachian tube dysfunction, chronic middle ear infections, and sudden hearing losses. Her special focus is on auditory rehabilitation and understanding the grief of hearing loss. Originally from North Carolina, she has lived all over the globe and decided to settle in beautiful, sunny Santa Cruz. She enjoys staying active, hiking, and the beach with her family and two dogs.
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!