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

Dr. Mark Joseph McWilliams, DDS

Individual provider Dentist · NPI 1780744227

Dr. Mark Joseph McWilliams, DDS is a Dentist in Watertown, New York. Licensed in New York. Registered with an NPI since 2006.

Licensed in
NY
In the registry since
2006
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

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Practice location Address checks out

234 Rexford Pl
Watertown, NY 13601
Phone: (315) 782-5531
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dentist (primary) Taxonomy 122300000X · Licence 037131 (NY)

Record details

NPI number1780744227
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorNo
NPI enumeratedDecember 12, 2006
Last updated in NPPESJuly 8, 2007
Mailing address234 Rexford Place, Watertown, NY 13601

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