Meet Our Team

“For over 30 years we have set a high standard of professional excellence for physicians and staff. Our patients can be assured that industry changes, such as managed care, will never cause us to compromise our high standards.”

Mark Funt

Mark Ian Funt, MD, FACOG
Dr. Funt received his medical training at The Emory University School of Medicine. He was assistant professor at The Yale University School of Medicine until he left to become chief of gynecology and director of resident education at Stony Brook University. In 1982, he founded Stony Brook Gynecology and Obstetrics, P.C. with the idea of providing healthcare to women with the highest standards. His vast knowledge of gynecology is second to none with lectures across the country in topics of urogynecology and menopause. Dr. Funt has won numerous awards including Attending of the Year and has been recognized several times for his outstanding patient care.

Robert OkeefeRobert O’Keefe, MD, FACOG
Dr. O’Keefe completed his residency in obstetrics and gynecology at the University Hospital at Stony Brook where he was awarded the prestigious “Most Outstanding Resident Award”. He is a fellow in the American College of Obstetricians and Gynecologists and is among the first in the United States to be recertified by the American Board of Ob/Gyn. Dr. O’Keefe has over 30 years in private practice, caring for high-risk obstetric patients and performing many major and minor gynecologic procedures. He has a special interest in laparoscopic surgery and is a member of the American Association of Gynecologic Laparoscopists. Dr. O’Keefe is an assistant clinical professor in the medical school at Stony Brook and is active in training young physicians.
Jeffrey PorteJeffrey Porte, MD, FACOG
Upon graduating with his medical degree from the University of Washington in 1978, Dr. Porte came to SUNY Stony Brook for his residency in obstetrics and gynecology where he earned the Resident of the Year Award in both 1984 and 1986. He has remained in the Stony Brook healthcare system ever since, including a two-year stint as a clinical assistant professor in Stony Brook’s Department of Obstetrics and Gynecology. Dr. Porte brings over 30 years of experience to our staff. His expertise in the field is an essential part of the experience we provide at Stony Brook Gynecology and Obstetrics.
femaleJulie Welischar, MD, FACOG
Dr. Welischar has been an experienced member of the medical staff at Stony Brook Gynecology and Obstetrics for over 15 years. She has been a part of the Stony Brook University system right out of high school, graduating with magna cum laude honors with her bachelor of science in biology. With the exception of one year performing a residency at New York Medical College, Dr. Welischar has been a mainstay in Stony Brook healthcare schools and medical facilities her entire medical career and remains an integral part of Stony Brook Gynecology and Obstetrics. As a result, she has developed long-standing, friendly relationships with her patients, ensuring that patients are as comfortable as possible. Dr. Welischar’s fields of expertise include laparoscopic hysterectomy, surgery, the treatment of stress incontinence and adolescent gynecology.
Megan LochnerMegan Lochner, MD, FACOG
Dr. Lochner graduated magna cum laude with a degree in biology from Loyola College in Maryland and graduated from the School of Medicine at Stony Brook University as a member of the prestigious Alpha Omega Alpha honor society. She completed her residency in obstetrics and gynecology at the University Hospital at Stony Brook in 2007 as administrative chief resident, earning the Golden Scalpel Award two years in a row as well as awards in teaching and humanism. She enthusiastically joined the doctors of Stony Brook Gynecology and Obstetrics over 10 years ago and took special interest in building up the Sayville, now Bohemia office. Dr. Lochner offers a variety of medical and minimally invasive surgical options for gynecological conditions and enjoys caring for women of all ages from adolescence through menopause.
Melanie Van SiseMelanie Van Sise, MD, FACOG
After graduating from Cornell University with a bachelor of science in human development, Dr. Van Sise moved to Long Island where she studied medicine at the State University of New York at Stony Brook. She completed her residency training at Stony Brook University Hospital where she served as administrative chief resident in the obstetrics and gynecology program. During residency, she was recognized with the Golden Scalpel Award for excellence in surgery, the William J. Mann, M.D. Pathology Award, the Inspire Education Award, and the Martin L. Stone, M.D. Resident of the Year Award. Dr. Van Sise also has a particular interest in research and is published in the prestigious journal, Obstetrics and Gynecology. She serves as a research mentor to Ob/Gyn residents at Stony Brook and believes that education and mentorship are an integral part of advancing women’s health.
femaleAmy DeMarco, MD
Dr. DeMarco graduated cum laude with a degree in neuroscience from Colgate University and completed her premedical training at Columbia University. She then went on to complete both her medical and resident training at Stony Brook University Medical Center. During her residency, she was recognized with the Medical Student Teaching Award as well as the Heart of Midwifery Award for her dedication to women’s health and wellness. In her final year as a resident, she was recognized with the Richard J. Scotti Urogynecology Award. She has also been actively involved in clinical research, presenting her work at regional conferences of the American College of Obstetricians and Gynecologists.
Debra MorganDebra Morgan, NP
Debra Morgan is a board-certified women’s health nurse practitioner. She graduated with her bachelor of science in nursing from Adelphi University, and began her career at Long Island Jewish Hospital on the gynecology unit. Working there ignited her passion for caring for women. She went on to work in the postpartum unit at Stony Brook University Hospital and then transitioned to working in the outpatient Ob/Gyn office setting. Debra has been with our practice for 19 years, during which she pursued her graduate degree becoming a women’s health nurse practitioner. Debra feels it is her privilege to care for, educate and support women through all phases of their lives.
femaleLindsay Tito, NP
Lindsay Tito is one of our board-certified women’s health nurse practitioners. She started her career as a pediatric nurse but women’s health has always been her passion so she transferred to labor and delivery and started working with our doctors in the delivery room. Lindsay obtained her master's degree at Stony Brook University and began working with us as a nurse practitioner in the office in 2009. Lindsay truly enjoys teaching girls and women at all points of the reproductive spectrum the value of taking care of themselves in a caring and respectful way. She also loves spending time with families during prenatal visits. Her commitment to her patients is truly evident in all she does.
Christine  MartoranaChristine Martorana, NP
Christine Martorana is a board-certified women’s health nurse practitioner. She graduated with her bachelor of science in nursing from the University of Pennsylvania and early on decided to focus on women’s health. She continued her education at Penn, earning her master's degree in women’s health in 2000. Christine worked at Ob/Gyn practices in Manhattan and Nassau before joining us in 2017. Christine is dedicated to caring for women at all stages of their lives – from their very first exam as an adolescent through pregnancy and menopause- with compassion and an in-depth understanding of women’s unique needs.