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

Ruth Lauren Firmin, PHD

Individual provider Psychologist · NPI 1689233702

Ruth Lauren Firmin, PHD is a Psychologist in Belmont, Massachusetts. Licensed in Massachusetts and Rhode Island. Registered with an NPI since 2019.

Licensed in
MA, RI
In the registry since
2019
Specialties on file
2
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

115 Mill St
Belmont, MA 02478-1064
Phone: (617) 855-3445
Fax: (617) 855-3820
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

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 11564 (MA)
Psychologist Taxonomy 103T00000X · Licence PS01813 (RI)

Record details

NPI number1689233702
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorNo
NPI enumeratedJune 12, 2019
Last updated in NPPESSeptember 1, 2021
Certification dateSeptember 1, 2021

Other providers in Belmont