Dr. Heidi Ulfeng Gassner, MD

Dr. Heidi Gassner is a board-certified endocrinologist specializing in diabetes and metabolism, as well as pediatrics. She earned her medical degree from Wayne State University School of Medicine and completed her residency at Baystate Medical Center through Tufts University. With three decades of clinical experience, Dr. Gassner brings extensive expertise to treating hormonal and metabolic conditions in both children and adults. She provides care in English.

Dr. Gassner practices at multiple Kaiser Permanente locations throughout Northern California, including facilities in Vallejo, Roseville, and Oakland. She focuses on treating conditions such as diabetes mellitus and precocious puberty in young patients. Her practice includes managing early onset menstruation and various diabetes-related conditions. Dr. Gassner offers virtual care consultations and specializes in diabetes management tools including autoinjectors and insulin pen devices.