Katherine J. Lee, MD

“Committed to compassionate care in women’s health and wellness” Dr. Katherine Lee grew up in Southern California in San Marino. She attended college at Cornell University in Ithaca, New York. She then went to the University of California, Irvine where she received an M.S. in biomedical engineering. She received her medical degree from the University … Continued

Catherine V. Nguyen-Loh, DO

Growing up and caring for her diabetic mother, Dr. Nguyen-Loh views her mother as her first patient. It was her mother that instilled in their family the motto “Family First” and Dr. Nguyen-Loh believes that it was her calling to become a family physician. She selected to specialize in family medicine as it provides her … Continued

Brian M. Koperek, MD

“Providing extraordinary care to women of all ages.” Board certified in obstetrics and gynecology, and with over twenty years’ experience, Dr. Koperek has a special interest in using ultrasound in obstetrical care. Primary care for women with a mixture of office-based and hospital-based work was a major factor in Dr. Koperek`s decision to become an … Continued

Marc L. Winter, MD

“Committed to the continuous development and provision of minimally invasive gynecological surgery.” Dr. Winter has been practicing since 1989. His practice focuses on gynecology and he specializes in minimally invasive surgery. With more than 20 years of performing gynecological surgeries, Dr. Winter has invested his energy in developing and offering less invasive procedures to his … Continued

Susan A. Mendelsohn, MD

“Devoted care from one woman to another.” Dr. Susan Mendelsohn has been in private practice in the Laguna Hills area since 1990. She says the excitement, warmth and feeling in her heart of being the first one to actually touch a new life and bring it safely into the world will never change. “I chose … Continued

Sameena S. Syed, DO

Growing up as a child of an optometrist, Dr. Syed always wanted a career centered on patient care. Dr. Syed selected internal medicine because she enjoys a comprehensive view of each patient and helping improve their daily quality of life. Her approach to patient care is two-fold. First, she focuses on understanding her patients’ concerns. … Continued

Heidi M. Cough, MD

“Orange County native with a passion for the sciences and providing optimal patient care.” Dr. Heidi Cough completed her Obstetrics and Gynecology residency at the University of California, Irvine, where she served as Administrative Chief Resident in her final year. Dr. Cough received her medical degree from the University of California, Irvine and her undergraduate … Continued

Mary C. O’Toole, MD

“With an open-minded philosophy towards women`s care.” Dr. O`Toole feels that the patient should play an active role in making decisions of her own medical care. She is especially noted for her interest in women`s health, including but not limited to infertility, osteoporosis, and menopause, as well as the challenge of obstetrics. After earning her … Continued

Mercedes Tomioka, MD

A native speaker of Spanish and conversational Japanese, Dr. Tomioka brings cultural diversity, excellent skills, and her compassionate nature to her profession as a physician. Her grandparents immigrated to Peru prior to World War II and that is where Dr. Tomioka spent her early years surrounded by family, which included many physicians. Always concerned about … Continued

Elaine A. Gan-Yong, MD

Medicine has been a true calling for Dr. Gan-Yong and her family. Starting with her uncle who was a family medicine physician on staff for many years at Hoag Memorial Hospital Presbyterian, he was her true inspiration to pursue medicine. He provided care for the entire family and served as a great role model. Not … Continued