Home  |  Contact Us  |  Site Map  |  Staff Tools  |  Classes  |  Health Info  |  Newsroom

Home > Services & Locations > Unity Sleep Disorders Center > Meet our experts 
  Text Size A A A   Print This Page Print   Send


  Robert H. Israel, M.D., medical director.
  • Medical degree: State University of New York – Downstate Medical Center in Brooklyn, New York
  • Medical residency and Pulmonary fellowship: New York Medical College in New York City
  • Professor of Medicine at University of Rochester School of Medicine and Dentistry since 1990
  • Co-founded the St. Mary’s Sleep Disorders Center, which began in 1983
  • Medical Director of the Unity Sleep Disorders Center in 2000



  Margarita D. Zhavoronkova, M.D., associate medical director.
  • Medical degree: First Medical Institute in St. Petersburg, Russia
  • Residency: Internal Medicine at Unity Hospital
  • Board certified in Internal Medicine and Sleep Medicine
  • Member of the American Academy of Sleep Medicine
  • Joined Unity Sleep Disorders Center in 2000



  Alice C. Hoagland, Ph.D., M.B.A., director of the Insomnia Clinic.
  • Master of Arts: Clinical Psychology from the University of Rochester
  • Ph. D. in Clinical Psychology from the University of Rochester and a Master of Business Administration from University of Rochester – The Simon School
  • Post-Doctoral Fellowship in Clinical Psychology at the University of Rochester
  • Certified in Sleep Medicine by the American Board of Sleep Medicine
  • Joined Unity Sleep Disorders Center in 1998



  Leslie DiRisio, P.A., physician assistant in Sleep Medicine.
  • Graduated from the Physician Assistant program at Rochester Institute of Technology
  • Member of the American Academy of Sleep Medicine, the American Academy of Physician Assistants, and the Rochester Regional Physician Assistants Association
  • Joined Unity Sleep Disorders Center in 2000



  Jane Dorsey, N.P., nurse practitioner in Sleep Medicine.
  • Master’s degree in Science from the University of Rochester
  • Master’s degree in oriental medicine and acupuncture at the New York Chiropractic College Acupuncture Program in Seneca Falls, NY
  • Board certified family nurse practitioner
  • Is a registered nurse and member of the Nurse Practitioner Association of New York, American Academy of Sleep Medicine, and Sigma Theta Tau International
  • Currently completing licensure exams to practice acupuncture and oriental medicine
  • Joined Unity Sleep Disorders Center in 1999

Conditions & Resources
 » Sleep Apnea
 » Snoring
 » Insomnia
 » Narcolepsy
 » Sleep Walking
 » Restless Leg Syndrome