Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Brian Michael Karaszewski, MD

Individual provider Internal Medicine Physician · NPI 1255478376

Dr. Brian Michael Karaszewski, MD is an Internal Medicine in Williamsville, New York. Graduated from State University of New York at Buffalo School of Medicine in 1997, 29 years ago. Practices with Brain and Spine Medical Services PLLC, a 56-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
29
Trained at
State University of New York at Buffalo School of Medicine
Licensed in
NY
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

400 International Dr
Williamsville, NY 14221
Phone: (716) 631-3555
Fax: (716) 631-9525
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 213340-1 (NY)

Record details

NPI number1255478376
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 30, 2007
Last updated in NPPESAugust 19, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolSTATE UNIVERSITY OF NEW YORK AT BUFFALO SCHOOL OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice Brain And Spine Medical Services Pllc — 56 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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