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We strive to provide you with the best possible care, and that begins with our team. We consider ourselves to be a family at Long Island IVF, as many of us have worked together for over 30 years. Our physicians and staff understand that building a family can be a challenging journey. In fact, some of them have been patients of Long Island IVF themselves! Consistently recognized as Best Doctors in New York and Top Doctors on Long Island, our physicians are truly devoted to helping you start your family.

Daniel Kenigsberg, MD is a board certified reproductive endocrinologist. He completed his residency in gynecology and obstetrics at Johns Hopkins Hospital in Baltimore and his fellowship in reproductive endocrinology at the National Institutes of Health in Bethesda, Maryland. Dr. Kenigsberg then became the director of reproductive endocrinology at the State University of New York, Stony Brook. His studies in ovulation induction and ovarian physiology have won national awards. He left SUNY at Stony Brook in 1988 to co-found Long Island IVF. Dr. Kenigsberg has also authored "The Baby Solution," a step-by-step guide to overcoming infertility.

"We live in an age when we are approaching almost limitless possibilities in the treatment of medical disorders. Infertility is one such condition. Over the past three decades, remarkable developments in medical, surgical, and laboratory techniques have resulted in the growth of a subspecialty devoted to treatment of infertility. I have been fortunate to be able to practice that medicine during this exciting era. The entire team of embryologists, nurses, and doctors feel a common bond with our patients during their treatment as well as after they have left us as newly started families."

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Meet Dr. Kenigsberg

David Kreiner, MD graduated with AOA honors from SUNY Downstate in 1981 with aspirations to start an IVF program on Long Island. That dream became a reality when—upon completion of his fellowship and a year as assistant professor at the Jones Institute in Norfolk, VA—he joined Dr. Kenigsberg to found Long Island IVF and achieved the first successful IVF east of the East River in 1988. Over the years, Dr. Kreiner has won two national awards for infertility research, was a finalist for the top research award from the American Society for Reproductive Medicine for his work on endometriosis, and was granted the Teddy Roosevelt Award at JT Mather Memorial Hospital and the Family Building Award from the American Fertility Association for his efforts with maximizing success while minimizing risk with IVF. In 2017, after studying Traditional Chinese Medicine for two years, Dr. Kreiner became the first REI in the Northeast to become certified in medical acupuncture, offering Long Island IVF patients acupuncture on site at the time of their embryo transfer. His professional goal of assisting his patients is summarized by the title of his book he authored, “Journey to the Crib.”

"I was deeply influenced by some of my earliest patients' experiences with high-order multiple pregnancies and births. As a husband and father, I strongly believe my role as a physician is to facilitate conception for my patients in the most medically safe and economically efficient way possible."

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Meet Dr. Kreiner

Steven Brenner, MD is a highly published board certified reproductive endocrinologist who completed his residency in obstetrics and gynecology at Beth Israel Medical Center, New York, and his fellowship in reproductive endocrinology at New York University School of Medicine. He was the chief of Reproductive Endocrinology and Infertility at Long Island Jewish Medical Center from 1991-2008. Currently, Dr. Brenner is a Clinical Associate Professor in the Department of Obstetrics and Gynecology of the Hofstra North Shore – LIJ School of Medicine. Dr. Brenner has received national recognition for his continued dedication to the training of the resident physicians at LIJ. His association with Long Island IVF has helped enable it to maintain its pre-eminent position on Long Island.

"Reproductive endocrinology is a challenging, meaningful, and rewarding subspecialty. I regard it as a true privilege to treat patients who suffer from problems with infertility. The rewards, when successful, extend not only to my patients but to their own families who will now be grandparents, aunts and uncles. The impact that I have as a physician not only on all of these individuals, but all of those people who are effected by a child in his or her own future, represents a reward that is indescribable."

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Meet Dr. Brenner

Joseph Peña, MD joined East Coast Fertility, the practice which would become Long Island IVF, in 2004. He received his medical degree from the New York University School of Medicine and completed his residency in Obstetrics and Gynecology at Pennsylvania Hospital in Philadelphia, the oldest hospital in the United States. Dr. Peña then completed his fellowship in Reproductive Endocrinology and Infertility at the prestigious Columbia University College of Physicians and Surgeons, where he stayed on as an Assistant Professor at the Center for Women’s Reproductive Care. He currently holds an appointment as a Clinical Assistant Professor of Obstetrics & Gynecology at the New York College of Osteopathic Medicine. Dr. Peña is board certified in Obstetrics and Gynecology and Reproductive Endocrinology/Infertility and has numerous publications in peer-reviewed journals. Dr. Peña is a member of the American Society for Reproductive Medicine, the Society for Reproductive Endocrinology and Infertility, the American Congress of Obstetricians & Gynecologists, and the Obstetrical and Gynecological Society of Suffolk County. Dr. Peña has been named annually to Castle Connolly's Top Doctors™ and the New York Super Doctors® lists over the past several years.

"In college I contracted Guillain-Barré Syndrome, a paralyzing autoimmune disorder. After six weeks in ICU and then a year-long rehabilitation, I realized that I was drawn to the field of medicine. Having been a patient myself, I know the importance of having a caring and competent physician."

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Meet Dr. Peña

Michael Zinger, MD received an MD with special distinction for research in reproductive endocrinology at the Albert Einstein College of Medicine of Yeshiva University. Dr. Zinger completed residency in obstetrics and gynecology at North Shore University Hospital in Manhasset, followed by fellowship in reproductive endocrinology and infertility at the University of Cincinnati under Dr. Robert Rebar, Director of the American Society for Reproductive Medicine. In 2002, Dr. Zinger was awarded the Senior Fellows Award for outstanding research by the Endocrine Society. He headed the IVF program at Edward Hospital for six years before joining East Coast Fertility. Dr. Zinger is board certified in reproductive endocrinology and infertility as well as in obstetrics and gynecology. Patient Satisfaction Ratings Zinger

Meet Dr. Zinger

In addition to being a male reproductive specialist at Long Island IVF, Yefim R. Sheynkin, MD, FACS, is also an associate clinical professor of urology and director of male infertility and microsurgery at Stony Brook University Medical Center. Trained in urology at Maimonides Medical Center in Brooklyn, he continued his education as a fellow at the Center for Male Reproductive Medicine and Microsurgery at the New York Hospital-Cornell Medical Center. Dr. Sheynkin has unique experience and years of expertise in reproductive medicine, microsurgical treatment of male infertility, and sperm retrieval techniques for in vitro fertilization.

Dr. Sheynkin has authored and co-authored book excerpts and numerous peer reviewed scientific articles about male infertility in the national and international journals including Journal of Urology, Fertility and Sterility, Urology, and Human Reproduction. Dr. Sheynkin is board certified by the American Board of Urology and is a member of numerous medical professional societies. His other clinical interests include male sexual dysfunction and testis-sparing treatment of testicular cancer.

Kathleen Droesch, MD joined the staff at Long Island IVF in 1994. She completed her reproductive endocrinology fellowship at the Jones Institute for Reproductive Medicine in Norfolk, Virginia. After her post-graduate training, she joined the medical school faculty at SUNY at Stony Brook as an Assistant Professor. Dr. Droesch is board certified in obstetrics and gynecology and reproductive endocrinology. She has published extensively on novel topics and treatments in reproductive endocrinology and infertility. Her areas of special interest include ovum donation and oocyte cryopreservation for patients preparing for chemotherapy.

As a resident in obstetrics and gynecology, I had the opportunity to work with a marvelous reproductive endocrinologist, Dr. Fred Benjamin. His intuitive teaching abilities opened my eyes to the fascinating field of reproductive medicine. The concept that our knowledge of biochemistry and cellular kinetics could be transferred into the miraculous clinical result of overcoming infertility, crystallized my career choice. The wonder has never lessened because infertility is such an intensely private matter, it makes each success a special and singular triumph.

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Meet Dr. Droesch