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Dr. Clark has a passion for healing and for improved patient outcomes. Following fellowship training, Dr. Clark was recruited by Hoag Hospital as the first Medical Director for the Womens Center for Continence. He received his medical degree from the University of Utah School of Medicine and completed his residency in Obstetrics and Gynecology. After completing residency, he further specialized by completing a Fellowship in Female Pelvic Medicine and Reconstructive Surgery ("Urogynecology") at Indiana University/Methodist Hospital in Indianapolis, IN.

Dr. Clark is nationally recognized for his surgical skills and teaches advanced surgical techniques to other physicians throughout the United States. In 2008, he was invited by the Jordanian government to teach advanced gynecology surgery techniques to the Ministry of Health Gynecology Division. Dr. Clark uses a wide range of surgical and laparoscopic techniques and a da Vinci® robot. He participates in the design and development of surgical instruments and uses cutting edge urogynecology surgery techniques, products, and modalities.

Professional Recognition

• Board Certified, OB/GYN
• Board Certified, Female Pelvic Medicine and Reconstructive Surgery
• Member, Phi Beta Kappa
• Fellow, American Association of Gynecologic Laparoscopists
• Invited Guest of Government of Jordan to teach minimally invasive gynecologic surgery

Dr. Clark is an active member of the Orange County community having served as a youth soccer coach for over a decade and as a Scout Master in the Newport Beach Boy Scouts program. He enjoys hiking, camping and ocean sports. You may see him rowing a scull in the Newport Bay in the early morning hours. Dr. Clark is a family man and has been married to his wife for 35 years. Together they have four children. 

Nathaniel DeNicola, MD, MSHP, FACOG, is a board-certified obstetrician and gynecologist who sees patients at Orange County OBGYN in Newport Beach. He grew up in Los Angeles and Orange County, rooting for the Dodgers and Lakers. When traveling, he always makes In-N-Out his first stop when returning to California. He enjoys bodysurfing on the peninsula in Newport Beach and taking his one-year-old daughter, Keaton, to swim class.

Nathaniel has Orange County roots: he attended high school at Santa Margarita and completed medical school at the University of California, Irvine.  

Nathaniel also has professional experience outside California: he completed residency in obstetrics and gynecology at Tulane University and still returns to New Orleans annually to present lectures and enjoy charbroiled oysters.  After residency he earned a Masters of Science in Health Policy Research (MSHP) with the Robert Wood Johnson Clinical Scholars program at the University of Pennsylvania.

Prior to returning to California in 2020, Nathaniel worked on health policy in Washington, DC, where he held a joint appointment with Johns Hopkins Medicine. He is a national leader on emerging telehealth policy and serves as the resident telehealth expert for the American College of Obstetricians and Gynecologists. He also has international leadership in environmental health policy and holds liaison roles with the American Academy of Pediatrics, the International Federation of Gynecology and Obstetrics, and the World Health Organization.

Yonatan Mahller, MD, PhD,  is a board-certified obstetrician and gynecologist who provides expert obstetric and gynecologic care to women of all ages at Orange County OBGYN in Orange County. Patients can access a full range of services at his office in Newport Beach, California, where he offers well-woman care, care for low and high-risk pregnancies, pre-conception and infertility counseling and treatment for menopause. Dr. Mahller combines excellent surgical training with cutting-edge technology, including the MonaLisa Touch® laser that treats vaginal discomfort associated with menopause and urinary incontinence. He is affiliated with Hoag Hospital.

Dr. Mahller is a native of Southern California. While at the University of California at Santa Barbara, he obtained a Bachelor’s degree in physiology and a Master’s degree in molecular biology. He then relocated to the Midwest to attend the University of Cincinnati College of Medicine, where he completed a dual degree program, obtaining his M.D. and a Ph.D. in developmental biology. He then returned to California and completed residency in obstetrics and gynecology at the prestigious Cedars Sinai Medical Center in Los Angeles.

Throughout his medical training, Dr. Mahller has won numerous awards recognizing his caring bedside manner and stellar surgical skills. While in graduate school, he performed significant preclinical research studies utilizing novel anticancer agents and authored numerous publications on topics such as cancer stem cells. He has given multiple presentations at international scientific meetings. During residency, Dr. Mahller created and implemented a course for OB/GYN residents, teaching them the Spanish needed to provide care to Spanish-speaking patients.

Dr. Mahller's patients count on him to devote the time needed to answer their questions, get to the underlying cause of their symptoms and develop an individualized treatment plan.

When he’s not caring for patients, Dr. Mahller likes to develop new technology, travel, cook, and spend time with his family.

Catalin Marinescu, MD, FACOG, specializes in pelvic surgery with an emphasis on minimally invasive procedures at OBGYN CARE in Newport Beach and Irvine, California. He performs gynecologic surgeries, such as hysterectomy and reconstructive procedures for prolapse or other pelvic floor defects, as well as procedures to treat urinary incontinence. Dr. Marinescu has affiliations with Hoag Hospital Newport Beach and Hoag Hospital Irvine.

Dr. Marinescu had an unparalleled 10 years of post-graduate residency training. He did a general surgery program at Carol Davila University of Medicine and Pharmacy in Bucharest, Romania and was trained in obstetrics and gynecology at the prestigious Mount Sinai Hospital Medical Center in Chicago, affiliated with Rush University.

Highly trained in obstetrics and gynecology, including infertility, Dr. Marinescu offers advanced prenatal diagnosis for high-risk pregnancies and follows the safest and most effective guidelines for delivery. His results are outstanding in difficult deliveries and minimally invasive surgeries, with over 200 da VinciⓇ robotic surgeries performed. 

Due to his unique worldly experiences on both sides of the Atlantic, Dr. Marinescu understands the impact of different cultures on each woman’s unique personality. He is attentive to each woman’s concerns and respectful of her time. He exercises great compassion and care with his patients, and works in a collaborative effort with other specialists to determine the best course of action for each patient’s specific journey. 

Dr. Lawrence Bruksch achieved his undergraduate degree in Biology at Northwestern University and his medical degree at the University of Illinois, where he graduated at the top of his class and with multiple honors, including selection to the exclusive Alpha Omega Alpha Honor Medical Society, one of only two OB/GYN physicians in Santa Monica so recognized. Dr. Bruksch founded Plaza Towers Obstetrics & Gynecology, which was the busiest OB/GYN practice at Cedars-Sinai Medical Center from 1982-2002 and has been the busiest practice at St. John's Health Center from 2002-2012. Dr. Bruksch has performed the majority of gynecologic surgeries for the practice over that time, gaining a wealth of experience in all facets of surgery.

His special interests are urogynecologic surgeries, pelvic reconstruction and multiple and high risk pregnancies. He has been voted "Super Doctor of Los Angeles" by his peers, "Patients' Choice" by his patients and recently received a commendation from St. John's Health Center for "Outstanding Patient Satisfaction".

This practice provides expert, evidence-based care for major reproductive and midlife transitions, including postnatal depletion, perimenopause, and menopause—stages that carry real long-term health implications yet are often under-treated. I am a Certified Nurse Midwife, Menopause Society Certified Practitioner, and Professor of Nursing, with graduate training from Yale School of Nursing. My approach blends clinical rigor with a midwifery model of care. To midwife menopause and postpartum recovery means to guide, educate, and partner rather than rush or dismiss. Care includes individualized assessment, hormone therapy when appropriate, and practical guidance around nutrition, movement, sleep, mental health, sexuality, and long-term disease prevention. Patients who choose this practice value expertise, personalization, and collaborative decision-making, with a focus on strength, resilience, and vitality over the long term.

Dr. Shamsah Amersi is one of the country's leading and most recognized Ob-Gyns. She graduated in the top 1% of her medical school UCSF, ranked number three in the world for the best medical school. She graduated alpha omega alpha, an honor bestowed to top 1% of all doctors in the country.

Dr. Amersi has won national awards throughout her career for her work in women's health and has been chosen as Top Doctors of the United States for the past years. She has delivered over 13,000 babies during her career, including being the personal physician to high profile clients and celebrities. Dr Amersi is a leading expert in treating hormone imbalances for women at all phases of their lives including PCOS, weight loss, infertility, perimenopause and menopause. She implements a unique holistic personalized treatment plan and formulates an individualized treatment compromising of supplements, lifestyle, compounded and bioidentical hormone therapy.

 

Recognition & Leadership

She is proud to serve on the Menopause National Association Advisory BoardMenopause National Association Advisory Board, helping shape the future of care for women navigating midlife and beyond.

Her work has also been honored with numerous awards that reflect both clinical excellence and compassionate patient care:

• Who's Who in America – Ranked #1 Obstetrician & Gynecologist in California, 2024, 2025
• Top OB/GYN in America – 2020, 2021, 2022, 2023, 2024
• Los Angeles Top Doctors – 2017 through 2025
• Best of the Best Doctors Los Angeles – 2024, 2025
• Compassionate Doctor Award – 2020 through 2024
• Southern California Super Doctor Award – 2019 through 2026
• America’s Most Honored Doctor (Top 1%) – 2019 through 2025
• Patients’ Choice Award – 2019 through 2024

These honors affirm her commitment not only to medical excellence but also to treating every patient with empathy, respect, and dignity.

Dr. Amersi has been in private practice for 23 years and specializes in a holistic approach to women's health. She has been providing comprehensive women’s health services in Los Angeles since 2002. Highly-trained and honored by the medical community, she is certified by the American Board of Obstetrics and Gynecology and a Diplomat of the American College of Obstetrics and Gynecology. Dr. Amersi implements the most advanced, state-of-the-art technology and treatment options. She teaches students from UCLA and the art of women's health, and serves as a mentor to physician assistants from Yale University. She is a pregnancy consultant for Headspace, a meditation app used by millions of people around the world. She also serves as on the health advisory board for Anya, Cool as Cucumber, ROM tech.

The health of your lifestyle is an essential component not only in the prevention, but also in the treatment of chronic diseases, often allowing medications—and the risk of their side effects—to be reduced. By emphasizing a personalized, holistic approach to healthcare, Dr. Amersi will build a close partnership to help you reach your full potential. This approach to healthcare can benefit everyone—whether you are very healthy or suffer from a medical condition—and will allow you to optimize your general health in the future. From nutrition and lifestyle changes to detoxification programs, Amersi MD offers the most advanced recommendations for optimal health, happiness, and longevity.

Whether you are visiting her for a routine check-up, to address a serious health concern, to plan a new addition to the family, or for surgery, you can rest assured that Dr. Amersi will guide you through each appointment with individual attention, clear communication, compassion, and exceptional skill.

She employs the latest techniques in cancer screening and prevention. For your convenience, all diagnostic testing, labs, ultrasounds are performed right in here the office – there is no need to visit a separate facility for your care.

Supported by her warm professional team, Dr. Amersi treats women through all phases of life and cherishes the special one-on-one relationship between patient and doctor. Dr. Amersi is the only practitioner at her office and you will receive personal service from a trusted friend every time you visit.

A New Era of Holistic Hormone Health for Women

I’m Dr. Shamsah Amersi, a board-certified OB/GYN who has spent more than two decades caring for thousands of women through every stage of life. Over these years, I’ve seen far too many women dismissed, misdiagnosed, or handed generic solutions that never touch the root of their symptoms. I founded my practice to change that—because women deserve care that is deeply personal, science-based, and truly transformative.

My Philosophy of Care

True healing begins with listening. Every woman’s body tells a unique story, and my role is to uncover the underlying drivers of imbalance—not simply mask them. By blending the precision of Western medicine with the insights of functional, root-cause-driven strategies, I help women restore balance across their hormonal, metabolic, emotional, and neurological systems.

This is not “alternative medicine.” This is comprehensive medicine—anchored in science, advanced diagnostics, and personalization.

A Holistic, Evidence-Based Toolkit

My integrative approach combines the best of modern medicine with lifestyle and functional strategies:

• Lifestyle Optimization: Nutrition, exercise, and stress reduction are foundational. As a pregnancy consultant for Headspace, I’ve seen how mindfulness and emotional well-being directly impact hormonal equilibrium.
• Targeted Supplementation: Pharmaceutical-grade supplements, adaptogens, vitamins, and minerals prescribed based on your biology and biomarker testing.
• Bioidentical Hormone Therapy (BHRT): When necessary, I use plant-derived hormones that are structurally identical to those produced by the human body—allowing for more natural and effective hormone replacement.

Why Personalization Matters

Hormone health is never one-size-fits-all. PCOS, thyroid disorders, perimenopause, menopause, endometriosis—these conditions manifest differently in every woman. That’s why my care begins with thorough listening, advanced biomarker testing, and individualized treatment plans that meet your specific biology and goals.

The Benefits of a Comprehensive Approach

By treating the root cause rather than silencing symptoms, women often experience:

• Restored energy, metabolism, and weight balance
• Improved insulin sensitivity and thyroid function
• Greater resilience to stress and adrenal health
• Enhanced fertility and ovarian function
• Sharper focus, mental clarity, and stable mood
• Stronger bones, healthier skin, and increased muscle strength
• Protection for long-term vitality, longevity, and health span

This is about feeling better today while also protecting your health for the decades ahead.

My Promise to Women

You do not have to accept fatigue, mood swings, weight changes, or brain fog as “just part of being a woman.” You deserve care that is deeply personal, backed by data, and tailored to your unique physiology.

When your body’s systems are supported in harmony, everything improves—your energy, mood, resilience, and long-term health. My mission is simple: to empower women to feel informed, connected to their bodies, and able to thrive at every stage of life.

Mission Statement

My mission is to transform the way women experience hormone health by providing care that is personalized, science-based, and deeply compassionate. I am committed to addressing the root causes of imbalance—hormonal, metabolic, emotional, and neurological—rather than masking symptoms with temporary solutions.

By blending the precision of advanced diagnostics with lifestyle medicine, targeted supplementation, and bioidentical hormone therapy, I help women not only feel better today but also protect their health span—the years of life lived in strength, clarity, and vitality.

I believe every woman deserves to thrive at every stage of life, empowered with knowledge, supported with the right tools, and cared for with both medical expertise and humanity.

Welcome to the Santa Monica OBGYN practice of Dr. Tristan Emily Bickman. Dr. Bickman. As a trusted OBGYN in Santa Monica, she has served the local community for over 18 years and specializes in all aspects of obstetrics and gynecological care. From early womanhood through pregnancy, menopause and beyond, Dr. Bickman and her team are committed to providing every patient with the best care.

Dr. Bickman is committed to making a difference in the lives of her patients. Her goal is to provide compassionate, comprehensive care with state-of-the-art diagnostics and treatments. She believes that her patients deserve personalized care, and she wants her patients to feel like they can ask her any question, or call anytime they have a problem or concern.

Dr. Tristan Bickman provides a full range of obstetric and gynecologic services for women of all ages. She provides general consultations, annual gynecological exams, ultrasounds, pre and post natal care, and treatment for issues relating to pelvic pain, infertility, menopause, and osteoporosis.

A mother of five herself, Dr. Bickman has a special interest in obstetrics and loves to deliver babies. In fact, Dr. Bickman had a C-Section, and a subsequent 4 VBAC's. Additionally, Dr. Bickman has struggled with infertility, so is able to relate to her patients on a very personal level.  She specializes in high-risk pregnancies, and strives to help women have the birth experience they desire. Unlike many group OBGYN practices, Dr. Bickman delivers all her patients’ babies herself. Her patients never have to worry who will be with them in the delivery room. This practice brings a warm, personal touch to one of the most important moments in your and your baby’s life.

Dr. Bickman is a board certified OBGYN with hospital affiliations at both St. John’s Health Center and UCLA Medical Center. Dr. Bickman was born and raised in Los Angeles, attending Westlake School for Girls for high school, UC Berkeley and UCLA undergraduate and the USC school of Medicine. Dr. Bickman did her residency at Cedars Sinai Medical Center.

I began my training in womens care in the Navy in 1985. I have served on a ship, worked as an Emergency Room physician, and a general surgeon while on board ship. Since that time many years ago, I have treated many many women for all types of medical issues, both acute and chronic. I have come to appreciate womens health issues. My experience ,candor, and listening will hopefully provide to you the care you seek. Here is a state regulation which needs posting: The Open Payments database is a federal tool used to search payments made by drug and device companies to physicians and teaching hospital. It can be found at https://openpaymentsdata.cms.gov.

At Bloom Obstetrics and Gynecology in Tarzana, California, Neetu Sodhi, DO, MPH, FACOG offers the highest level of OB/GYN care to women of all ages, from their teenage years all the way through menopause. At Bloom, we are sensitive to each person’s needs and know that those needs are ever-evolving, not static. Responding to your specific lifestyle and life stage is important to us. Our services and surroundings will nurture women to come into bloom. Guiding this journey is Dr. Sodhi, an osteopathic OBGYN, who delivers top-quality care with an understanding and mutual respect.

David Ahdoot, M.D., FACOG is a board-certified OB-GYN, who serves as a diplomat of the American Board of Obstetrics and Gynecology.

Dr. Ahdoot obtained his medical degree at the University of California San Diego before going on to complete a nationally renowned residency program in Obstetrics and Gynecology at the University of California Irvine. He has authored more than 30 publications and is the recipient of numerous awards including Patient’s Choice Award and the Top 10 Doctor Award in Los Angeles.

In addition to seeing patients at his private practice, he also has an academic affiliation as an assistant clinical professor at UCLA. Dr. Ahdoot has privileges with three area hospitals: Providence Saint Joseph Medical Center, Encino-Tarzana Hospital, and Providence Holy Cross Hospital. Dr. Ahdoot is bilingual in both English and Spanish to better serve the patients in the community.

Dr. Ahdoot specializes in minimally invasive surgery and is a nationally recognized robotic surgeon. Aside from pregnancy, preventive and post-menopausal care, Dr. Ahdoot also strives to help his patients with specific medical conditions including ovarian cysts, uterine fibroids, PCOS, urinary incontinence, sexually transmitted diseases and other individualized health needs that may affect women today.  

Dr. Ahdoot’s highest priority is his patients and the care they receive. His ultimate aim is to improve the quality of life for each and every one of his patients.

At your first appointment, Dr. Ahdoot and his staff will take the time to discuss your medical history in full detail in order to make sure that the best possible individualized treatment options are offered to you. Call Dr. Ahdoot today to get started on the path to better health!

OB/GYN Dr. Maryam Ardalan of Women Elite Care, Inc. in Valencia, California, chose her life-long career path when she was only thirteen years old. Her passion for helping heal members of her community made her pursue medical training. She attended the West Azerbaijan University of Medical Sciences in Iran. During her medical externship, she began to love the field of Obstetrics and Gynecology. She was fascinated by how educating and treating women would help them live long and healthy lives.

Once she finished her externship, Dr. Ardalan completed four years of residency training as an OB/GYN. She graduated with honors and began working with diagnosing and treating infertile couples. Throughout the years she has participated in multiple research projects involving infertility.

Following completion of residency training in Iran, Dr. Ardalan began work in the rural areas of Northwestern Iran. She later had the opportunity to participate in an OB/GYN clinical rotation in Vienna, Austria for a year.

After finishing her rotation in Austria, she immigrated to the United States with her family. Her love and dedication to Obstetrics and Gynecology gave her the drive to successfully complete the Medical Board examinations and re-enter four years of residency at Harbor-UCLA Medical Center. Upon completion, she started a position at the University of San Francisco as an assistant professor in the department of OB/GYN for two years where she was tasked with instructing medical students and residents. Dr. Ardalan moved to Valencia, California, shortly after and has been working in the area since 2009.

Dr. Ardalan’s mission is to provide quality medical care in a professional, supportive, and loving environment.

She is a member of numerous medical societies including AMA (American Medical Association), ACOG (American Academy of Obstetrics and Gynecology), and AAGL (American Association of Gynecologic Laparoscopists).

At Valencia Center for Women’s Health, Dr. Navid Navizadeh is a leading provider of women’s health services including obstetrics and gynecology. Patients throughout the Valencia, California area, can receive services such as fetal testing, family planning, minimally invasive procedures, genetic counseling, gynecological cancers screening, laparoscopic surgery, 4D/3D ultrasounds, hysteroscopy, and pelvic reconstruction as well as care for infertility, menopause, urinary incontinence, and osteoporosis.

Dr. Navizadeh is the founder and medical director of Valencia Center for Women’s Health. He received his undergraduate degree in genetics and molecular biology at the University of California. Dr. Navizadeh completed a comprehensive research fellowship in molecular and cell biology at the University of California at San Francisco (UCSF). He further expanded his research experience at the University of Southern California’s School of Medicine, where he obtained his medical degree.

At the USC School of Medicine, Dr. Navizadeh had the chance to work on innovative research projects in the fields of obstetrics, gynecology, endocrinology, infertility, and ultrasound imaging. He investigated the effects of seizure disorders and the treatment programs in pregnancy. Dr. Navizadeh was awarded the Pacific Coast Fertility Society’s award in Estrogen research.

Dr. Navizadeh completed an internship in Obstetrics at the Parkland Memorial Hospital in Dallas, Texas. He continued his residency at Mount Sinai-Maimonides Medical Center in New York. In obstetrics, his group’s work in ultrasonography to predicate preterm labor was published and received several awards. In the area of infertility and endocrinology, Dr. Navizadeh's works contributed to the understanding of the effects of an embryo’s size and quality in the process of in-vitro fertilization (IVF). Dr. Navizadeh completed the prestigious Galloway fellowship at the Memorial Sloan-Kettering Cancer Center in New York City. There, he had the opportunity to advance his surgical skills in complex gynecological operations in addition to learning the latest laparoscopic and endoscope techniques.

Dr. Navizadeh has also expanded his interest to urogynecology and pelvic surgery. In southern California, he pioneered the use of the new Transopturator Sling procedure for treating female urinary incontinence.

Valencia Center for Women’s Health and Dr. Navizadeh welcome all new patients to the practice and can work with most forms of medical insurance.

At Valencia Center for Women’s Health, Dr. Michelle Uaje is a leading provider of obstetrics and gynecological medicine for women throughout Santa Clarita Valley area. At the Valencia, California location patients can receive services such as genetic counseling, gynecological cancers screening, fetal testing, family planning, 4D/3D ultrasounds, laparoscopic surgery, minimally invasive procedures, hysteroscopy, and pelvic reconstruction as well as care for urinary incontinence, infertility, menopause, and osteoporosis.

Dr. Uaje obtained her medical degree from the University of California at Irvine, and she completed her residency in obstetrics and gynecology at Kaiser Permanente in Santa Clara, during which she served as chief resident. Dr. Uaje is a concerned and capable OB/GYN, who serves the community and provides the utmost care to each person. She is certified by the American Board of Obstetrics and Gynecology and holds memberships in the American College of Obstetricians and Gynecologists and the American Association of Gynecologic Laparoscopists. Dr. Uaje received awards from Kaiser Permanente and the University of California at Irvine for her mentorship efforts. She has also served as an Associate Physician at the Southern California Permanente Medical Group.

Dr. Uaje is devoted to ensuring that patients’ health continues to improve and maintain optimal states. She is also passionate about developing long-lasting relationships with each and every one of her patients. Dr. Uaje works to take her time with patients so she can fully understand their symptoms and give accurate diagnoses to ensure the ongoing health of all her patients. Patients can visit Dr. Uaje for a wide array of reasons including pregnancy, breast cancer screening, fibroids, pap smears, and abdominal pain.

Valencia Center for Women’s Health and Dr. Uaje welcome all new patients to the practice, where most major forms of insurance are accepted.

As a physician, I believe that patients should be an equal partner in making decisions regarding their healthcare. That decision making should start with providing a comprehensive explanation of the condition, management options and ending with collaborative treatment solutions.

As a gynecologist and educator, I believe that my patients deserve to be heard and to understand their conditions and treatment options in a safe and respectful environment. Health care is a collaboration between the patient and the provider that takes into account not only physical but also emotional and social needs. Everyone is unique and should be treated as such. I am committed to providing that personal and individualized care to my patients.