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

Mark Allen Schaeffer, MD

Individual provider Internal Medicine Physician · NPI 1194866087

Mark Allen Schaeffer, MD is an Internal Medicine Physician in Princeton, New Jersey. Licensed in New Jersey. Registered with an NPI since 2007.

Licensed in
NJ
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

800 Bunn Dr Ste 302
Princeton, NJ 08540-1968
Phone: (609) 921-1680
Fax: (609) 921-1438
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 25MA04680500 (NJ)

Record details

NPI number1194866087
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 12, 2007
Last updated in NPPESMarch 11, 2012
Mailing address800 Bunn Dr, Suite 302, Princeton, NJ 08540-1968

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