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

Individual provider Clinical Psychologist · NPI 1871397604

Dr. Arthur Gallagher, PSYD is a Clinical Psychologist in Stony Brook, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2025
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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Practice location PO Box

The provider listed a PO Box rather than a street location, so this is not a walk-in address.

PO Box 51
Stony Brook, NY 11790-0051
Phone: (631) 621-2744
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 026592 (NY)

Record details

NPI number1871397604
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorYes
NPI enumeratedApril 2, 2025
Last updated in NPPESApril 2, 2025
Certification dateApril 2, 2025
Mailing addressPo Box 51, Stony Brook, NY 11790-0051

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