Our Professional Staff

Robert Diaz

Robert Diaz graduated with a degree in physical therapy from Upstate Medical Center at Syracuse, in 1991. He is a hands-on owner seeing patients on a daily basis. As the owner of Whitestone Physical Therapy of Queens since  September 2000, he has specialized in orthopedic, neurological and sports injuries. However, during his over 20 years of experience he has honed his skills in a variety of settings including acute hospital rehabilitation, home care and outpatient services. Committed to maintaining the most up to date information and skill level  he and his staff regularly participate in continuing education courses.

A former track and field and cross country runner and a veteran of road races including several marathons, Robert is aware of the body’s ability for recovery and improvement. His philosophy is there is potential for recovery in all patients. Robert promotes this ideal at his practice.

He enjoys bicycling, hiking, cross country skiing, water skiing and exercising with his wife and four children. He is an avid guitar player and sports fan. In addition he is fluent in Spanish and very proficient in Italian.

“The Human Body Has a Remarkable Ability To Recover”



Sharon Mayol, PT, GCS

Sharon Mayol, PT, GCS( Geriatric Clinical Specialist)

She is a graduate of Southwestern University in the Philippines and is currently working her Doctorate degree.

Sharon is certified in Level1&2 Mat Pilates and Pilates on Ball. She has extensive experience in treating the outpatient orthopedic population as well as neuromuscular and pediatric patients. Sharon is an integral part of our team. She is highly motivated and result oriented.



Maria Diercks (Encar), PT

Maria Diercks (Encar), PT, graduated from Physical Therapy school in 1991. She is a board certified Therapist with extensive experience in many aspects of physical therapy care. Her experience spans from acute care in the hospital setting, special education school setting and homecare. Currently, she divides her time between providing homecare and outpatient physical therapy in the orthopedic setting. She has established herself as an integral part of our team providing compassionate and effective physical therapy to all patients in her care.



Yan Yan Yu O. MD

Yan Yan Yu O, Acupuncturist

Yan Yan Yu O, MD graduated from Liao Ning University of Traditional Chinese Medicine in 1982. After which, she practiced Acupuncture at Liao Ning University Hospital of Traditional Medicine before moving to the United States. She has over 30 years of experience in treating patients with internal medicine, OB/GYN, infertility, to pain management aliments, and specializes in Acupuncture, herbal medicine, moxibustion, and cupping techniques.



Patient/office Coordinator
Maureen Igoe-Diaz

Utilizing her 30 years in the health care field, Maureen is a graduate of Adelphi university with a BS/MSN in nursing. She is a certified family nurse practitioner who has worked in multiple settings, including in-patient critical care units to homeless health care. She uses her knowledge and compassion to help patients get the care they need and deserve.