Physical Medicine & Rehabilitation
Unity Hospital
Faculty

Marissa Dombovy-Johnson, DO, FAAPMR
Pain Medicine, Physical Medicine and Rehabilitation
Additional Information
Board Certifications:
2021, Physical Medicine and Rehabilitation, American Board of Physical Medicine and Rehabilitation
2021, Pain Medicine, American Board of Physical Medicine and Rehabilitation
Medical Education:
New York Institute of Technology College of Osteopathic Medicine
Residency:
Mayo Clinic – Physical Medicine and Rehabilitation
Fellowship:
Mayo Clinic – Pain Medicine

Harold Lesser, MD, PhD
General Neurology, EMG
Additional Information
Board Certifications:
Electrodiagnostic Medicine
1994, Psychiatry and Neurology, American Board of Physical Medicine and Rehabilitation
Medical Education:
University of Rochester School of Medicine and Dentistry
Residencies:
University of Michigan Hospitals
Fellowships:
University of Michigan Hospitals

Nithyanandini Namassivaya, MD
Rehabilitation & Spinal Cord Injury
Additional Information
Board Certifications:
2002, Physical Medicine and Rehabilitation, American Board of Physical Medicine and Rehabilitation
2003, Physical Medicine and Rehabilitation – Spinal Cord, American Board of Physical Medicine and Rehabilitation
Medical Education:
Bangalore Medical College
Residencies:
University of Rochester

Cecilia L. Ransom, MD
Brain Injury, Rehabilitation, Spasticity Management
Additional Information
Board Certifications:
2008, Physical Medicine and Rehabilitation, American Board of Physical Medicine and Rehabilitation
2008, Physical Medicine and Rehabilitation – Brain Injury, American Board of Physical Medicine and Rehabilitation
Medical Education:
Eastern Virginia Medical School
Residencies:
Eastern Virginia Medical School

Sean Silverman, DO
Physical Medicine and Rehabilitation
Additional Information
Board Certifications:
2023, Physical Medicine and Rehabilitation, American Board of Physical Medicine and Rehabilitation
Medical Education:
Lake Erie College of Osteopathic Medicine
Residency:
University of Rochester Medical Center

Ding Zhang, MD
Physical Medicine and Rehabilitation
Additional Information
Medical Education:
Tongji Medical University
Residencies:
Beaumont Hospital
