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

Thomas Mason Postlethwait, DDS

Individual provider Dentist · NPI 1871638668

Thomas Mason Postlethwait, DDS is a Dentist in Dover, Delaware. Licensed in Delaware. Registered with an NPI since 2007.

Licensed in
DE
In the registry since
2007
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 →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

773 S Queen St
Dover, DE 19904
Phone: (302) 674-8283
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Dentist (primary) Taxonomy 122300000X · Licence GI 0000849 (DE)

Record details

NPI number1871638668
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorNo
NPI enumeratedFebruary 20, 2007
Last updated in NPPESJuly 8, 2007
Mailing address773 South Queen Street, Dover, DE 19904

Other providers in Dover