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

Dr. Mark Loesch, PHD

Individual provider Clinical Psychologist · NPI 1215357587

Dr. Mark Loesch, PHD is a Clinical Psychologist in Boston, Massachusetts. Licensed in California. Registered with an NPI since 2014.

Licensed in
CA
In the registry since
2014
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.

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Practice location Address checks out

75 State St Fl 26
Boston, MA 02109-1827
Phone: (617) 204-3500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X (CA)
Clinical Psychologist Taxonomy 103TC0700X · Licence 29157 (CA)

Record details

NPI number1215357587
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedApril 24, 2014
Last updated in NPPESFebruary 22, 2022
Certification dateFebruary 22, 2022

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