GYN Physicians

Ann Marie Raffo

M.D.

Seeing GYN patients only

“Cultivating patient trust and empowerment through educated care.”
Dr. Raffo received a Bachelor of Science degree from Agnes Scott College (a small women`s college in Georgia). She received her medical degree from University of California, Irvine, where she also completed her residency training. Dr. Raffo has been in practice with Orange Coast Women`s Medical Group since 1997.

“The excitement and diversity of obstetrics and gynecology is what attracted me to this specialty. I find it very rewarding to help my patients with their individual medical needs. Part of my responsibility as a physician is to provide education and options to my patients. I believe each patient has the right to be the ultimate decision maker in her own care. This can only be achieved if she understands the necessary information and has a mutually trusting relationship with her doctor.”

“Cultivating patient trust and empowerment through educated care.”

“The rewards of educating and caring for women of all ages are immense. It is a privilege to be part of that unforgettable moment in a womans life as she gives birth. The close relationships I have formed with many of my patients bring me great satisfaction. As we journey through lifes experiences together, it is gratifying to play a role in womens healthcare. Being a mother and a wife helps me relate to many of the issues my patients face.”

Dr. Raffo has a special interest in high-risk obstetrics and laparoscopy. Originally from Alabama, she has been a resident of Orange County since 1985. She lives locally with her husband and two sons.

“Entertaining friends and family brings me great enjoyment. I also enjoy traveling. Much of my free time is spent watching my boys play sports, particularly football and baseball. A new passion of mine is exercising. I finally started to practice what I preach and I am feeling the benefits of more energy what all of us need more of.”

Sees Patients in Irvine, Laguna Hills, and San Clemente

Brian Koperek

M.D.

Seeing GYN patients only

“Providing extraordinary care to women of all ages.”

Board certified in obstetrics and gynecology, and with over twenty year’s 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 Obstetrician/Gynecologist. The excitement of obstetrics where every delivery is special and the chance to care for women of all ages in gynecology had broad appeal. An opportunity to help women`s lives with a variety of gynecologic procedures and preventative medicine makes every day rewarding.

A graduate with honors from the University of California, Los Angeles, School of Medicine, Dr. Koperek completed his OB/GYN residency training at University of California, Irvine Medical Center. An Orange County native, he began his practice in South Orange County in 1987.

He spends his free hours with his beautiful wife Christy, his three children and two step children. He also enjoys playing guitar, snorkeling and bicycling.

Sees Patients in Irvine and Laguna Hills

Catherine Y. Han

M.D., M.P.H.

Seeing GYN patients only

Dr. Han was inspired to become a physician after volunteering in the emergency room the summer after her freshman year of college. While she met many excellent physicians, she also encountered moments that left her thinking, “we can do better.” That experience shaped her commitment to providing compassionate, thoughtful care. Medicine also runs deep in her family. Both of her parents were physicians, and her mother was one of the only female anesthesiologists at Hoag when she began practicing in the 1970s. Watching her mother thrive as a working parent in a male dominated field left a lasting impression and became a powerful example of dedication and resilience.

Drawn to obstetrics and gynecology because of the opportunity to be present for some of the most meaningful moments in a woman’s life, especially childbirth, Dr. Han built her career around supporting women through every stage of life. She now focuses her practice on caring for women navigating menopause, an area where she sees many patients who have previously felt unheard or dismissed. Known for her empathetic approach, she is passionate about listening carefully and ensuring her patients feel respected and taken seriously. Her philosophy of care centers on partnership. She believes that physician and patient are a team, and she encourages every woman to have a voice in her own health journey.

Dr. Han completed her undergraduate education at Harvard University, graduating with honors in English and American Language and Literature. She attended Cornell University Medical College in New York City for medical school. Dr. Han returned home to California for her residency in obstetrics and gynecology at University of California Irvine.

In 2023, Dr. Han returned to school to earn her Master of Public Health from the Harvard T.H. Chan School of Public Health, where she focused on Health and Social Behavior. She is especially interested in how social connections and community influence healthy habits. Outside of work, she rows with a group of women at the Newport Aquatic Center in the Back Bay, embracing the physical and mental strength that comes from teamwork. With three young adult children pursuing their education on the East Coast, Dr. Han feels she has come full circle. Her family moved to Newport Beach in the 1970s when her mother joined Hoag, and her parents still live just a mile from the hospital that has been part of their family’s story for decades.

Languages: Spanish

Sees Patients in: Irvine and Laguna Hills

Elizabeth Johnson

M.D.

Seeing GYN patients only

“A passionate physician offering compassionate care.”

As a board certified physician in obstetrics and gynecology, Dr. Elizabeth Johnsons interests include minimally invasive gynecologic surgery, management of abnormal Pap Smears/ Colposcopy, adolescent medicine, menopause management and general obstetrics. She works hard to involve her patients in a dynamic discussion about their health care needs and strives to provide comprehensive, evidence – based medicine, and surgical options to women throughout all phases of their lives.

“I find listening to patients, and ensuring that they are active participants in their care, provides the most successful treatment path.”

Dr. Johnson completed her premedical education at the University of Colorado in 1995. After working in research at The Children`s Hospital of Philadelphia for two years, she attended the University of Pittsburgh School of Medicine where, in 2001, she earned her medical degree with an area of concentration in women`s health and the Luba Robin Goldsmith Award for excellence in obstetrics and gynecology. She went on to complete her OB/GYN residency at Northwestern University in 2005. There she was recognized for excellence in resident teaching, research and compassionate patient care.

Dr. Johnson and her family have made San Clemente their home. Dr. Johnson provides excellent patient care to the residents of her community and she enjoys contributing to the growth of the Talega office.

Sees Patients in Irvine, Laguna Hills, and San Clemente

Linda H. Chung

M.D.

Seeing GYN patients only

“I strive to interweave my scientific training, my experience as a clinician, and my skills
as a surgeon to partner with women to achieve their health goals.”

Dr. Linda Chung is passionate about providing excellent health care to women. She is committed to evidence based medicine, while providing personalized health care that emphasizes partnering with patients. Her gynecology-only practice covers a range of significant health events in women’s lives, including problems with menses, infertility, family planning and menopause. In addition, Dr. Chung has a special interest in minimally invasive and robotic surgery, and holds a Minimally Invasive Gynecologic Surgery Focused Practice designation through the American Board of Obstetrics and Gynecology. She is also a NAMS Certified Menopause Practitioner.

She received her undergraduate education from Stanford University where she graduated with honors. She earned her medical degree at the University of California, San Francisco. She completed her training in Obstetrics and Gynecology at Kaiser
Foundation Hospital in San Francisco.

Dr. Chung lives in Orange County with her husband, also a physician, and their two sons. She enjoys skiing with family and book club with friends. Dr. Chung is involved in medical missions, and community and youth development nonprofit organizations.

Languages: Korean

Sees Patients in Irvine and Laguna Hills

Marc Winter

M.D.

Seeing GYN patients only

“Committed to the continuous development and provision of minimally invasive gynecological surgery.”

Dr. Winter completed medical school and residency training at the University of California at Irvine College of Medicine and has been practicing in Laguna Hills since 1989. His practice is limited to gynecology, and he specializes in minimally invasive surgery. He has been designated as a Focused Practice in minimally invasive gynecologic surgery by The American Board of Obstetrics and Gynecology. With more than 20 years of performing gynecological surgeries, Dr. Winter has invested his energy in developing and offering less invasive procedures to his patients. He was the first surgeon on the West Coast to perform a hysterectomy using robotic single-site technology (a procedure performed with a single small incision). He is a national expert in Robotic surgery and has experience in performing complex hysterectomies, myomectomies, endometriosis resections, cerclages, and sacrocolpopexy.

Serving as a Medical Director of Minimal Invasive Surgery at the Hoag’s Women’s Health Institute. Dr. Winter has performed over 2,300 robotic surgical procedures. Some of his recently published articles have shown better surgical results using robotic surgery for hysterectomy, cost-effectiveness of robotic hysterectomy, as well as excellent results performing robotic-assisted abdominal cerclage for incompetent cervix. He also has an interest in urogynecology, including pelvic reconstructive surgery and non-invasive surgical options for urinary incontinence.
Dr. Winter has been designated one of the twenty-three epicenters, or national training sites in benign robotic gynecologic surgery for Intuitive Surgical, the maker of the DaVinci Robot. At Hoag’s training ground, Dr. Winter educates surgeons nationwide on the latest in robotic surgical techniques. With his many years of clinical research and several published papers, he additionally teaches advanced gynecologic surgical courses in the community, with the honor of lecturing/performing procedures throughout the United States and overseas. Patients can expect the most advanced care and excellent clinical outcomes.

A man of many talents, Dr. Winter also has an interest in hormone replacement therapy and menopause, he recently presented an abstract evaluating the use of a silicone gel to treat genital-urinary symptoms of menopause.

In the midst of his busy clinical profession, he loves to travel, spend time with his family, watch sports, and rocking out with friends playing the saxophone.

Sees Patients in Irvine, Laguna Hills, and Newport Beach

Robot-Assisted Transabdominal Cerclage For The Prevention of Preterm Birth: A Multicenter Experience (co-written by Dr. Marc Winter)

Marie-Claire Leaf

M.D.

Seeing GYN patients only

“Dr. Marie-Claire Leaf completed her undergraduate degree at the University of California, Los Angeles (UCLA). She earned her medical degree and completed her Obstetrics and Gynecology residency at the University of California, Irvine (UCI), where she served as the Administrative Chief Resident. She then completed a two-year AAGL fellowship in Minimally Invasive Gynecologic Surgery at the Johns Hopkins Hospital. During her training, she received various service and leadership awards, including the “Outstanding Graduating Student Performance in Obstetrics and Gynecology” Award, “Outstanding Contribution to Medical Student Education Award”, and “Mentorship Award to a graduating resident” award. She was also granted the SGS Laparoscopy Award to a graduating resident.

Dr. Leaf’s practice is focused on gynecology and she specializes in minimally invasive gynecologic surgery. Her specialties include fibroids, endometriosis, abnormal uterine bleeding, pelvic pain, adnexal masses, and complex laparoscopic and robotic surgery. She enjoys providing a comfortable and empowering environment for patients to learn about their health conditions, and comprehensive counseling to learn about their medical and surgical options available to them.

In her free time, she enjoys spending time with her family and friends, traveling, and discovering new local activities.

Languages: French, medical Spanish, and conversational Japanese

Sees Patients in Irvine and Newport Beach

Norene Norris-Walsh

M.D.

Sees GYN patients only

“Devoted to the patient and physician relationship.”

With her background in Public Health, Dr. Norene Norris-Walsh is able to provide patient education in preventive medicine, stress reduction and nutrition. She is now specializing in Gynecology and Gynecological Surgery, with additional services in Clinical Bone Densitometry/Osteoporosis, Aesthetics Services (including Botox and Fillers) and Hormone Pellet Therapy.

“With evolving complexities of a woman`s life, there exists a specific practice of medicine unique to each woman. I find great joy in walking through life’s precious moments with my patients.”

At Saddleback Memorial Medical Centers she has served on numerous committees including the Perinatal Committee, Emergency Department Committee, and Physician Wellness Committee. She has served as assistant clinical professor at the University of California, Irvine Medical Center

Her undergraduate training was performed at University of San Diego. She then traveled to New Orleans where she simultaneously earned a master’s degree in Public Health with her medical degree at Tulane University. Dr. Norris-Walsh completed her residency training at University of California, Los Angeles-Harbor. She is a Diplomat of the American Board of Obstetrics and Gynecology and a fellow of the American College of Obstetrics and Gynecology.

Dr. Norris-Walsh is happily married and has three wonderful children, two lovely sons in-law, and one grandson. She attends Shoreline Church in San Clemente.

Languages: French

Sees Patients in Laguna Hills and San Clemente

Sheila Z. Dejbakhsh

M.D.

Seeing GYN patients only

Dr. Dejbakhsh completed her undergraduate degree at the University of California, Los Angeles. She then went on to receive her medical degree from the University of California, San Diego, followed by a Master’s degree in Public Health at Columbia University. She completed her residency at the Ronald Reagan UCLA Medical Center.

Dr. Dejbakhsh pursued Obstetrics and Gynecology because of her passion for individualized women’s health. She enjoys providing longitudinal care to her patients through every stage of their life. She has strong interests in pre-conception counseling, complicated obstetrics, postpartum care, family planning, and management of fibroids. She is particularly interested in minimally invasive surgical technique with laparoscopy and the robotic-assisted surgery, and was the recipient of the Recognition of Excellence in Minimally Invasive Gynecology award during her residency.

In her free time, Dr. Dejbakhsh enjoys running, hiking, traveling and spending time with her family and friends. Dr. Dejbakhsh was born and raised in Orange County in the city of Irvine, and is very excited to return back to serve her community.

Speaks: Farsi and Spanish

Sees Patients in Foothill Ranch, Irvine, and Laguna Hills

Stephanie Da Silva Davis

M.D.

“Dedicated to providing multidisciplinary, individualized care to women throughout their lifespan with a passion for optimizing female sexual health”

Dr. Davis completed her undergraduate degree at Columbia University in New York. She then went on to receive her medical degree from the University of California, San Diego and completed her residency at LAC+USC Medical Center in Los Angeles. Dr. Davis received numerous accolades during her medical training including induction to the Gold Humanism Honor Society, Society of Maternal Fetal Medicine Outstanding Resident of the Year Award, and Best Patient Advocate/Choice for their Personal Physician as selected by her peers.

Dr. Davis is skilled in providing comprehensive obstetric and gynecologic care utilizing a holistic approach supplemented by complementary services with a special focus on the pregnancy and postpartum period. Her interest in integrative medicine helps to fill the growing need to better support women utilizing a biopsychosocial approach. Dr. Davis is also passionate about sexual health, with expertise in treating sexual dysfunction and a goal to optimize sexual function for women from adolescence through menopause.

Dr. Davis’ biggest strength is her ability to connect with patients in a comfortable and non-judgmental environment. She can clinically and surgically manage routine and complex cases guided by high quality, evidence-based medicine while providing the latest advancements in minimally invasive surgery including the Da Vinci robotic system.

In her free time, Dr. Davis enjoys cooking, hiking, surfing, doing yoga and spending time at the beach with her husband and children.

Languages: Spanish and Portuguese

Sees Patients in Irvine, Laguna Hills, and Tustin