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

Mark P Hoornstra, MD

Individual provider Emergency Medical Services (Emergency Medicine) Physician · NPI 1255498580

Mark P Hoornstra, MD is an Emergency Medical Services (Emergency Medicine) Physician in Roslyn, New York. Practices as a sole proprietor. Licensed in New York.

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

100 Port Washington Blvd Dept OF Emerency Medicine
Roslyn, NY 11576-1353
Phone: (516) 562-6605
Fax: (516) 629-2027
Show map & directions

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

Specialties & licences

Emergency Medical Services (Emergency Medicine) Physician (primary) Taxonomy 207PE0004X · Licence 187340-1 (NY)

Record details

NPI number1255498580
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 3, 2007
Last updated in NPPESFebruary 2, 2009
Mailing addressPo Box 1470, Port Washington, NY 11050-7470

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