Important Covid-19 Information

Our top priority is to protect the health and well-being of our patients and staff. If you are displaying any signs or symptoms of COVID-19 such as a sore throat, fever, cough, loss of taste or smell, shortness of breath or have known exposure to someone who has tested positive for Covid-19, we ask that you reschedule your appointment for at least two weeks in the future. We also ask that you come to your appointment alone.  If someone must accompany you to your appointment, please let us know in advance as we are limiting the number of people in the office.  Masks must be worn at all times in our office. Please call us with any questions or concerns.

6760 Main Street

Williamsville, NY 14221

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Kenneth S. Zimmerman, M.D.


Kenneth S. Zimmerman, M.D. has been practicing Internal Medicine since 1986. He is a board certified Internist who attended SUNY Buffalo School of Medicine and completed his residency training in the Buffalo University Hospital system. 

Work Experience

Dr. Zimmerman is an Associate Professor of Medicine at The Jacobs School of Medicine at SUNY Buffalo and continues to train the next generation of physicians through mentoring.

He has participated in training medical residents during resident orientation week at the Jacobs School of Medicine at SUNY Buffalo  and he has mentored first and second year medical students over the last five years.


He has two daughters, both of whom are physicians completing residency training in Internal Medicine at Brown and Yale. Dr.  Zimmerman is an avid Peloton cyclist, kayaker, cross country skier and collector of medical antiques.

Susan Bennett, RPA-C


Susan Bennett received her Physician Assistant degree, Summa Cum Laude from D’Youville college in 1998.

Work Experience

She is certified by the National Commission on Certification of Physician Assistants (NCCPA) and is a member of the Western New York Physician Assistant Association. She has worked with Dr. Zimmerman since 2000. She is the recipient of the Professional and Business Women of Polonia Scholarship and mentors students applying to Physician Assistant programs..


Sue enjoys Peloton cycling and is a member of a local flute club.

Christine Vosburgh, CMRS


Christine Vosburgh is our Office Manager and has been with the practice since 2019. She holds an associate degree in Medical Administrative Assisting, and a bachelor’s degree in Health Care Management.

Work Experience

Christine is a Certified Medical Reimbursement Specialist with over 8 years of billing experience and over 12 years of experience in the medical field. 


Christine is married and has 3 children. She enjoys camping and outdoor activities with her kids.