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

William Siemiaszko, DDS

Individual provider Dentist · NPI 1720295009

William Siemiaszko, DDS is a Dentist in Seekonk, Massachusetts. Licensed in Connecticut, Massachusetts, New York and Ohio and 2 more. Registered with an NPI since 2007.

Licensed in
CT, MA, NY, OH, PA, RI
In the registry since
2007
Specialties on file
6
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.

See every abbreviation used in this directory →

Practice location Address checks out

20 Commerce Way
Seekonk, MA 02771-5823
Phone: (508) 336-6700
Fax: (508) 336-6742
Show map & directions

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

Specialties & licences

Dentist (primary) Taxonomy 122300000X · Licence 21050 (MA)
Dentist Taxonomy 122300000X · Licence 004430 (CT)
Dentist Taxonomy 122300000X · Licence DEN02924 (RI)
Dentist Taxonomy 122300000X · Licence 052591-1 (NY)
Dentist Taxonomy 122300000X · Licence 30-022317 (OH)
Dentist Taxonomy 122300000X · Licence DS036764 (PA)

Record details

NPI number1720295009
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorNo
NPI enumeratedMay 17, 2007
Last updated in NPPESJuly 8, 2007

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