HMS Manhattan

Alan Katz, MD, FUHM, FACEP, FAAEM

National Medical Director

Alan A Katz, M.D. is the National Medical Director for Hyperbaric Medical Solutions (HMS), directing clinical operations, as well as education and research initiatives for all HMS locations. He has been a leader in the fields Hyperbaric Medicine and Emergency Medicine for over 30 years.

Henry Prince, MD, FACOG

Chief Medical Officer

Dr. Henry Prince has led Hyperbaric Medical Solutions since its inception in 2011, forging important clinical relationships in the medical community and pioneering the practice’s effort to help patients experience optimal health using the incredible healing properties of HBOT. He has been practicing medicine on Long Island and the New York metropolitan area for over 30 years with extensive experience in the areas of obstetrics and gynecology, as well as HBOT. After graduating cum laude from Downstate Medical School, with Alpha Omega Alpha distinction, Dr. Prince completed his residency at North Shore University Hospital in Manhasset, New York. He is board certified in obstetrics and gynecology and accredited in HBOT. Dr. Prince is the President and Founder of Women’s Health Professionals, a large women’s health practice, a Mount Sinai affiliated physician, and an active member in both the American College of Obstetrics and Gynecology and the Undersea and Hyperbaric Medical Society.

Cydney Taylor, RPA‑C

Physician Assistant

Cydney started as a Physician Assistant in 1999 after completing her degree at the CUNY/Harlem Hospital Physician Assistant Program and CUNY/Hunter College School of Public Health. Cydney is passionate about using a holistic, integrative approach to health and wellness. Hyperbaric Oxygen Therapy compliments this passion and her professional interests in primary medicine, functional medicine, and public health.

Maryellen Bonito, PA-C

Physician Assistant

Maryellen attended Wagner College in Staten Island, NY, for both her undergraduate degree and Master's of Physician Assistant Studies. She graduated in 2013 and then entered a one-year Post-Graduate Emergency Medicine Physician Assistant Residency Program at NewYork-Presbyterian / Weill Cornell Medicine. Upon completion, she stayed on board at Weill Cornell Medicine / Lower Manhattan Hospital and spent the first nine years of her career as an Emergency Medicine Physician Assistant.

After years of taking a very "traditional" approach to patient care, Maryellen found herself developing a growing interest in complementary and alternative medicine. She began working part time at Hyperbaric Medical Solutions in 2021, in hopes of formally exploring another side of healthcare. She quickly grew to love the new concepts and approach and transitioned to working at HMS full time shortly thereafter. She currently serves as the lead clinician for the NYC office. She has found this shift in her career to be eye opening, exciting, and genuinely fulfilling. 

Maryellen is proud to be a part of the regenerative medicine community and is thrilled to continually navigate this space as an HMS provider, where she has the opportunity to work alongside many well-respected and distinguished professionals. The HMS clinical group is comprised of individuals from various backgrounds who collectively offer an extensive level of expertise about hyperbarics, and beyond. Furthermore, everyone's dedication and enthusiasm have led to countless accomplishments and achievements over the years. Overall, she is honored to be a part of the impressive and inspiring team of clinicians at HMS.

Maryellen is looking forward to what is to come, in the world of regenerative medicine, and hyperbarics specifically. She is especially excited to be a part of this journey with HMS, as the organization continues to pave the path towards the future of this industry.