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

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