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

Dr. Marcus S Dempster, MD

Individual provider Hematology & Oncology Physician · NPI 1881223519

Dr. Marcus S Dempster, MD is a Hematology & Oncology Physician in Williamsville, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2020
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

199 Park Club Ln Ste 200
Williamsville, NY 14221-5269
Phone: (716) 634-3340
Fax: (716) 634-3350
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 331143 (NY)

Record details

NPI number1881223519
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 4, 2020
Last updated in NPPESJune 2, 2026
Certification dateJune 2, 2026

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