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Faculty Profiles

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Core Faculty


Stephanie Lin

Stephanie Lin, MD, FACOG
Program Director

Medical School: Weill Cornell Medical College
Residency: NewYork-Presbyterian Hospital Weill Cornell Medical Center
Fellowship: University of Utah Health Sciences Center

Dr. Lin works at both the San Luis Obispo Perinatal Center at French Hospital Medical Center and the Perinatal Obstetrics/Gynecology Center at Marian. She is also an obstetric hospitalist who has been teaching medical students and family medicine residents.

Anne Kennard

Anne Kennard, DO, FACOG, Dip-ABLM
Associate Program Director

Medical School: A.T. Still University School of Osteopathic Medicine in Arizona
Residency: Banner University Medical Center- Phoenix, AZ
Fellowship: University of Arizona, Tucson. Andrew Weil Center for Integrative Medicine.

Dr. Kennard is Board-Certified in both OB/GYN, Lifestyle Medicine, and Fellowship-trained in Integrative Medicine.  She holds a B.S. in Nutrition Science. Dr. Kennard is the OB/GYN Interim Associate Program Director and faculty, as well as the Director for Integrative Medicine and Resident Physician Wellness at Marian Regional Medical Center. She speaks nationally and publishes on topics including women's integrative medicine, nutrition, culinary medicine, and physician wellness. Her research is focused currently on mindfulness and physician coaching as wellness interventions in graduate medical education. She is the author of two Amazon bestsellers: "Nourish: An Integrative Medicine Cookbook" and "Conscious Anti-Racism", and is a certified yoga instructor.

Danielle Feldman

Danielle Feldman, MD

Medical School: University of California, Los Angeles 
Residency: University of California, Los Angeles
Maternal-Fetal Medicine Fellowship: Cedars Sinai Medical Center, Los Angeles

Dr. Feldman works out of the Perinatal Obstetrics/Gynecology Center in Santa Maria and is the Director of Maternal-Fetal Medicine education for the residency program.

Brett Lebed

Brett Lebed, MD

Medical School: Temple University
Surgery and Urology Residencies: Temple University Female Pelvic Reconstruction / Urogynecology
Female Pelvic Reconstruction Fellowship: Medical University of South Carolina

Dr. Lebed is fellowship-trained and board-certified in Female Pelvic Reconstruction/Urogynecology and Voiding Dysfunction. Dr. Lebed has taught residents and medical students in Urology and Female Pelvic Health since 2008. Previously, Dr. Lebed was the Director for Female Urology and Urodynamics at Temple University Hospital in Philadelphia. Dr. Lebed is the Director of Female Pelvic Medicine and Reconstructive Surgery for the residency program.

Jonathan Tammela

Jonathan Tammela, MD

Medical School: Indiana University School of Medicine
University of Florida, Jacksonville
Roswell Park Cancer Institute 

Dr. Tammela is triple board certified in Gynecologic Oncology, Hospice and Palliative Care, and Obstetrics and Gynecology. Dr. Tammela practiced for 13 years in Green Bay, WI, where he established the first gynecologic oncology program in Northeast Wisconsin. Dr. Tammela is a trailblazer in his field, having established the first full time Robotic Gynecologic Oncology program in Northeast Wisconsin over 10 years ago, when robotic surgery was just beginning to show clinical promise in surgical cancer care. In recognition of Dr. Tammela’s intense dedication to women’s cancer care during his many years in the Green Bay community, he won a number of awards, including the “Living the Mission Award” at St Vincent Hospital for commitment to excellence, and the “Innovator of the Year Award,” given by the Green Bay Business Journal in recognition of Dr. Tammela as an innovator in cancer treatment and robotic minimally invasive surgery.

Mona Bazargan

Mona Bazargan, MD




Tad Callahan

Tad Callahan, MD, MPH

Medical School: University of California, Irvine, College of Medicine
Residency: University of California, Irvine, College of Medicine

Dr. Callahan has been an obstetrician/gynecologist at Marian for many years and continues to train medical students and family medicine residents in obstetrics and gynecology in the hospital.

Brian Crisp

Brian Crisp, MD

Medical School: Uniformed Services University of the Health Sciences
Family Medicine Residency: Silas B. Hays Army Community Hospital
OB/GYN Residency: Tripler Army Community Hospital

Dr. Crisp is double board-certified in family medicine and as an obstetrician/gynecologist. After almost thirty years of service, Dr. Crisp retired from the U.S. Army.  Prior to his second residency in ob/gyn, Dr. Crisp taught Family Medicine at Tripler Army Medical Center and was an Assistant Clinical Professor of Medicine at the University of Hawaii.  While Chief of ob/gyn at Fort Carson, Colorado he was appointed Adjunct Assistant Professor of ob/gyn at the Uniformed Services University of the Health Sciences. He became a Fellow of the Royal Australian and New Zealand College of ob/gyn  while caring for an underserved population on New Zealand’s northeast coast. Since joining our team at Marian, Dr. Crisp has continued training medical students and Family Medicine residents in the hospital and providing didactic instruction.

Jade Mas

Jade Mas, MD

Medical School: Herbert Wertheim College of Medicine
Residency: Stamford Hospital / Columbia - Presbyterian

Dr. Jade Mas, MD is an obstetrics & gynecology specialist. She believe everyone deserves to be heard and cared for. She takes her time with each patient, and believes that a relationship between patient and doctor is one of honesty and you should walk away fully understanding what is happening and why.  

Larry Shields

Larry Shields, MD

Medical School: University of Texas, School of Medicine,
Residency: Medical Center Hospital/University of Texas Health Center San Antonio
Maternal-Fetal Medicine Fellowship: University of California, San Diego

After his training, Dr. Shields spent 13 years at the University of Washington and later served as program director of the Maternal-Fetal Medicine Fellowship there. He has also served as volunteer faculty at Stanford University as the resident supervising attending for labor and delivery. At Dignity Health, Dr. Shields is the director of Perinatal Services at Marian as well as the medical director of Perinatal Safety, overseeing patient safety and quality for the 29 maternity hospitals within Dignity Health. He has served as member of the California Maternal Quality Care Collaborative (CMQCC), serving on the following committees: Pregnancy-Related and Pregnancy-Associated Mortality Review (CA-PAMR), Maternal Hemorrhage Taskforce, and the Preeclampsia Taskforce as co-chair. He has over 20 years of experience as a maternal-fetal medicine specialist with a strong commitment to optimizing maternal and fetal outcomes, especially in pregnancies complicated by maternal medical or abnormal fetal conditions. Dr. Shields works out of the Perinatal Obstetrics/Gynecology Center in both Santa Maria and San Luis Obispo.

Elaine Yin

Elaine Yin, MD

Medical School: Temple University, School of Medicine
Residency: Temple University, School of Medicine

Dr. Yin works on the Central Coast as an obstetrician/gynecologist, conducts research in collaboration with California Polytechnic University in San Luis Obispo, and has served as chief of staff and department chair at different hospitals on the Central Coast. At Marian, she is the department chair of obstetrics/gynecology and has been training medical students and family medicine residents in obstetrics and gynecology in the office and hospital, including during surgery, as well as providing didactic instruction.

Eli Zinner

Eli Zinner, MD

Medical School: University of Pennsylvania
Residency: Temple University

Dr. Zinner is a board-certified obstetrician/gynecologist and has been working with residents for over ten years, most recently with family medicine residents at Marian. Dr. Zinner is the Director of Medical Student Clerkships in ob/gyn at Marian. 


Adjunct Faculty

Rocky Greer, MD, Rotation Coordinator
Robert M. Turbow, MD 

Obstetric Hospitalists
Carol Karamitsos, MD
George Johnson, MD

Community Health Center
Estrella Chavez Benzaquen, MD
Tarek El Kheir, MD

Medicine Hospitalists
Willard Chung, MD, Program Director of Family Medicine Residency
Erine Erickson, MD
Ijeoma Ofiaeli, MD
Brandon Penn, MD
Joseph Yorke, MD

Emergency Department
Charles Merrill, MD, Rotation Coordinator
Caleb Bailey, MD
David Ketelaar, MD
Sam Miller, DO
Mary Welch, DO



Learn More About Our Residency Program

Please contact Sarah Perry
(805) 739-3926
[email protected]