Your Journey is Our Journey

Every woman’s journey is unique. MemorialCare Medical Group offers dedicated women’s services, so we can care for you through all stages of life. Our extensive range of services include well-woman care, reproductive, maternity, minimally-invasive surgery, menopause and more. Our providers are here to empower you with more options, better care and peace of mind.

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Gynecology Care

MemorialCare Medical Group knows it is our privilege to care for a woman’s unique needs in all stages of life and health.

We can optimize your care and let you know what to expect at each milestone. Our personalized approach to gynecological care was created to ensure every woman we see is treated as she is our only patient. From well exams and imaging, to intervention and robotic surgery, our care and treatment options address all gynecologic conditions

Our team of compassionate and highly credentialed professionals welcome your needs and questions. Women take care of so many, and we consider it an honor to take care of you.

Routine primary and preventative care

  • Yearly and well-woman exams
  • Screenings
  • Contraceptive counsel
  • Pediatric or adolescent gynecology

Medical or surgical management of all gynecological problems

  • Pelvic pain and Pelvic floor disorders
  • Breast care
  • Uterine fibroids
  • Endometriosis
  • Urogynecology
  • Cysts and masses
  • Infections/treatment

Menopause

  • Therapies
  • Procedures
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Pregnancy Care

So many dreams and hopes come with the miracle of birth.

MemorialCare Medical Group understands you are entrusting us with the most important moments in your baby’s prenatal development and birth. Our obstetricians are experienced, certified professionals who treat the whole patient. From helping you discover the wonderful news, to guiding you through each trimester, to keeping your baby safe and healthy through birth and postpartum. We are your experts.

Patients have the comfort of knowing their babies will be delivered at Miller Children’s & Women’s Hospital Long BeachOrange Coast Medical Center or Saddleback Medical Center.

Meet our MCMG Doctors

Gerardo Bustillo, MDGerardo Bustillo, MD

Medical Director of Minimally Invasive Surgery at Orange Coast Medical Center

Office Location:
Fountain Valley, CA
(657) 241-9090


Martin W. Muth, MDMartin W. Muth, MD

Office Location:
Long Beach, CA
(657) 241-8990


Rachael Lopez, MDRachael Lopez, MD

Office Location:
Laguna Hills, CA
(949) 770-4115


Phyllis D. Oster, MDPhyllis D. Oster, MD

Office Location:
Long Beach, CA
(657) 241-8990


G Thomas Ruiz, MDG Thomas Ruiz, MD

Office Location:
Fountain Valley, CA
(657) 241-9090


photo of Kenneth Spielvogel, MDKenneth Spielvogel, MD

Office Location:
Long Beach, CA
(657) 241-8990


Daniel Sternfield, MDDaniel Sternfeld, MD

Office Locations:
Laguna Hills, CA
Irvine, CA
(949) 770-4115


Vaya Tanamai, MDVaya Tanamai, MD

Office Locations:
Laguna Hills, CA
Irvine, CA
(949) 770-4115


Yen H. Tran, MDYen H. Tran, DO

Office Location:
Fountain Valley, CA
(657) 241-9090


Paul R. Weber, MDPaul R. Weber, MD

Office Location:
Long Beach, CA
(657) 241-8990


Elizabeth H. West, MDElizabeth H. West, FACOG

Office Location:
Long Beach, CA
(657) 241-8990


Stephanie Wyckoff MDStephanie M. Wyckoff, MD

Office Location:
Fountain Valley, CA
(657) 241-9090


Miao Crystal Yu, MDMiao Crystal Yu, MD

Office Locations:
Laguna Hills, CA
Irvine, CA
(949) 770-4115

Certified Nurse Midwives

Giving personalized care and guidance through pregnancy, childbirth, and all aspects of female reproductive health is the role of the modern midwife.

Trained and licensed to provide care in all areas of women’s health, our midwives guide you through all the seasons of your life. All of MemorialCare Medical Group’s certified nurse midwives (CNM), can provide routine check-ups, gynecological examinations, contraceptive and birth control counseling, as well as labor and delivery care. They offer comprehensive support and care from the teenage years, all the way through menopause.

A holistic partner in your pregnancy journey, MemorialCare Medical Group’s midwives are (bachelor’s or master’s level) practitioners certified by the American College of Nurse-Midwives. They are standing ready to serve each mother’s unique needs and preferences from a healthy, low-risk pregnancy through birth and postpartum.

Midwifery Services

  • Well-Women Exams
  • Pregnancy, Delivery and Postpartum
  • Family Planning and Counseling
  • Breastfeeding Education and Support
  • Breast and Cervical Cancer Screenings
  • Pre-Conception Counseling
  • STD Screening and Treatment

Meet our MCMG Midwives

Denise G. Castellanos, CNMDenise G. Castellanos, CNM

Office Location:
Fountain Valley, CA
(657) 241-9090


Patricia A. Evans, CNMPatricia A. Evans, CNM

Office Location:
Fountain Valley, CA
(657) 241-9090


Annette L. McConnaughey, CNMAnnette L. McConnaughey, CNM

Office Location:
Fountain Valley, CA
(657) 241-9090


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We're Connected

Your health is important to you around the clock—not just during office hours. Our system-wide electronic medical records can be accessed by providers at any MemorialCare patient touch point. You can request appointments and prescription refills, email your provider, review your health history and more—online, any time through myChart.

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Minimally Invasive Procedures

Diagnostic and operative hysteroscopy - Hysteroscopy is an outpatient procedure used to diagnose or treat problems of the uterus. It is performed using a thin, lighted telescope-like device inserted through the vagina into the uterus. It is used for:

  • Removal of fibroids to treat both abnormal uterine bleeding and infertility.
  • Resection of submucous myomas - Treatment of uterine fibroids that may be causing infertility. 
  • Endometrial polyps - Polyps are benign tumors that grow in the lining of the uterus. Hysteroscopy is used to remove them.
  • Edometrial ablation - A procedure used to treat heavy or abnormal uterine bleeding. 
  • Diagnosis of pelvic pain

Laparoscopy - Laparoscopy is a minimally invasive surgery that uses a thin tube which is inserted through a keyhole incision in the abdomen or pelvis to perform operations that used to require large incisions. Recovery times are shorter and patients usually have less pain with laparoscopic surgery. It is used for less complex tubal and ovarian conditions. 

Vaginal Surgery

Vaginal hysterectomy is used to treat a variety of gynecologic conditions, including:

  • Precancerous lesions of the uterus and cervix
  • Uterine prolapse - When supporting tissues and ligaments in the pelvis get stretched out or become weak, the uterus can lower or sag into the vagina, causing urinary incontinence, pelvic pressure and abnormal bleeding due to small fibroids or adenomyosis.
  • Endometrial Hyperplasia
  • Carcinoma in situ of the cervix
  • Fibroids
  • Endometriosis
  • Abnormal bleeding
  • Chronic pelvic pain

Bladder sling procedures - These are minimally invasive surgical procedures used to treat stress incontinence. 

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About MemorialCare Medical Group

MemorialCare Medical Group is a member of the nonprofit MemorialCare Health System, an integrated delivery system that includes five top hospitals – Long Beach Memorial, Miller Children’s & Women’s Hospital Long Beach, Community Hospital Long Beach, Orange Coast Memorial, and Saddleback Memorial; and medical groups – MemorialCare Medical Group; an Independent Practice Association (IPA) Greater Newport Physicians; and numerous outpatient health centers throughout the Southland.