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

Dr. Michael William Dempsey, MD

Individual provider Internal Medicine Physician · NPI 1770508079

Dr. Michael William Dempsey, MD is an Internal Medicine Physician in Riverhead, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2006
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

1190 Old Country Rd
Riverhead, NY 11901-4450
Phone: (631) 727-1818
Fax: (631) 727-7365
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 130241 (NY)

Record details

NPI number1770508079
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 13, 2006
Last updated in NPPESDecember 28, 2011
Mailing address1190 Old Country Rd, Riverhead, NY 11901-4450

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