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Patients in Williamsville and around Erie County see Dr. Marissa L. Boniszewski, an internal medicine physician, at Buffalo Medical Group, P.C.
Dr. Boniszewski at a glance
- Specialty
- Internal medicine physician
- Credentials
- MD
- Practice
- Buffalo Medical Group, P.C.
- Address
- 325 Essjay Rd, Williamsville, NY 14221
- Phone
- (716) 630-1000
- Medical school
- University of Toledo College of Medicine (2018)
- Hospital affiliations
- Kaleida Health, Sisters of Charity Hospital
- Medicare assignment
- Accepts
- Telehealth
- Available
- NPI number
- 1780181347
- NY license no.
- 308573
She graduated from University of Toledo College of Medicine in 2018, which means 8 years have passed since medical school.
You'll find Dr. Boniszewski at 325 Essjay Rd, Williamsville, NY 14221. Call (716) 630-1000 to schedule. 236 clinicians bill Medicare through Buffalo Medical Group, P.C., so it is a large group practice rather than a solo office. She accepts Medicare assignment — useful to know if you are on traditional Medicare. She is listed as offering telehealth.
On the hospital side, Dr. Boniszewski holds affiliations with Kaleida Health and Sisters of Charity Hospital.
Reviews here come only from patients. If you've seen Dr. Boniszewski, add yours.
Medicare, Medicaid and hospitals
- Medicare patients (2024)
- 139 people with traditional Medicare, average age 68
- Medicare quality score (MIPS 2024)
- 86 out of 100 — reported through the group practice
- New York Medicaid
- Enrolled fee-for-service provider since 2021. Medicaid managed-care plans keep their own networks, so check with your plan.
- Hospital pages
- Kaleida Health · Sisters of Charity Hospital
Medicare figures cover people with traditional (fee-for-service) Medicare only; services billed for fewer than 11 patients are not published.
Comparing internists? See 24 in Williamsville or 166 across Greater Buffalo.
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Frequently Asked Questions
With Buffalo Medical Group, P.C., at 325 Essjay Rd, Williamsville, NY 14221.
Call the office at (716) 630-1000.
Yes — Dr. Boniszewski accepts Medicare assignment, taking the Medicare-approved amount as full payment for covered services.
Kaleida Health and Sisters of Charity Hospital.
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