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

Dr. Mark C Johnston, PHD

Individual provider Psychologist · NPI 1023026200

Dr. Mark C Johnston, PHD is a Psychologist in Boston, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts.

Licensed in
MA
In the registry since
2006
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

607 Boylston St Rasi Associates - 2nd Fl
Boston, MA 02116-3604
Phone: (617) 266-2266
Fax: (617) 266-6070
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

Psychologist (primary) Taxonomy 103T00000X · Licence 7902 (MA)

Record details

NPI number1023026200
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedAugust 4, 2006
Last updated in NPPESJuly 8, 2007
Mailing address607 Boylston St, Rasi Associates - 2nd Floor, Boston, MA 02116-3604

Other providers in Boston