Meet Our Physicians

Andrew Nyein, DO, is an obstetrician-gynecologist and the founder of Mulberry OBGYN, a women’s health practice providing personalized care from preconception and pregnancy through perimenopause, menopause, and beyond.

As the next generation of a family that has cared for women across New York for more than fifty years, Andrew Nyein, DO, brings that tradition to a modern and comprehensive approach to women’s health.

In addition to menopause care, he is trained in minimally invasive and robotic-assisted gynecologic surgery. This allows him to evaluate and treat abnormal bleeding, fibroids, pelvic pain, endometriosis, and other gynecologic conditions that may overlap with or complicate hormonal changes during midlife.

He also holds an academic appointment as a Clinical Instructor in Obstetrics and Gynecology at Weill Cornell Medicine.

Mulberry combines evidence-based hormonal care with comprehensive gynecologic care, allowing patients to receive coordinated evaluation and treatment within one practice.

Andrew Nyein, DO, brings a calm, reassuring approach and prioritizes helping patients feel comfortable, informed, and confident — especially when navigating complex or sensitive decisions. His approach is rooted in osteopathic medicine and shaped by an understanding of how hormones, physical health, emotional well-being, and lifestyle are interconnected. Mulberry OBGYN was created to reflect that philosophy: thoughtful, one-on-one, and deeply personal.

Betty Nyein, MD, is a board-certified obstetrician-gynecologist with more than 20 years in practice. She sees patients at Mulberry OBGYN's Centre Street office in Lower Manhattan.

She is part of the family that has cared for women across New York for more than fifty years, and she brings that same one-on-one approach to Mulberry. Appointments are unhurried, so there is time to ask questions and talk through each step.

Her care at Mulberry focuses on preconception and concierge obstetric care, high-risk obstetrics, advanced ultrasound, and minimally invasive office procedures. She believes every patient should feel heard, understand what is happening with their health, and take an active part in decisions about their care.