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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

PAUL T MCMAHON PH.D.
NPI 1902139405
Psychologist - Clinical in Upland, CA

Active since September 15, 2009
820 N MOUNTAIN AVE, UPLAND, CA 91786(213) 700-9900 Get Directions Write a Review

NPPES record last updated: August 26, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Aug 26, 2026, Sep 30, 2020 (2 updates tracked since 2020).

About Paul T Mcmahon Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

PAUL T MCMAHON PH.D. (NPI 1902139405) is an individual clinical provider in Upland, California, licensed in California (PSY15721) and active in the NPI registry since September 2009.

NPPES Registry Identity

NPI1902139405
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NamePAUL T MCMAHONCredential: PH.D.
Location Address820 N MOUNTAIN AVEUpland, CA 91786-4111
Mailing Address2058 N Mills AveClaremont, CA 91711-2812 · (213) 700-9900
Phone(213) 700-9900
Sole ProprietorYes
Enumeration DateSeptember 15, 2009
Last NPPES UpdateAugust 26, 20262 updates tracked since enumeration
NPPES CertifiedAugust 26, 2026
✔ NPI 1902139405 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in CA · PSY15721
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
820 N MOUNTAIN AVE, Upland, CA 91786
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Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CALIFORNIA CLINICAL, ASSESSMENT, RESTORATION AND EVALUATION, A PROFESSIONAL PSYCHOLOGICAL CORP
Psychologist
820 N MOUNTAIN AVE
UPLAND, CA 91786
San Bernardino County (213) 700-9900
KENNEDY HOSPICE, INC.
Hospice Care, Community Based
820 N MOUNTAIN AVE, SUITE #110
UPLAND, CA 91786
San Bernardino County (909) 587-6009

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Paul Mcmahon's NPI number?

The NPI number for Paul Mcmahon is 1902139405. It was assigned to this individual provider in the NPPES registry on September 15, 2009.

Where is Paul Mcmahon located?

Paul Mcmahon practices at 820 N Mountain Ave, Upland, CA 91786. The listed phone number is (213) 700-9900.

What is Paul Mcmahon's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for Paul Mcmahon was last updated on August 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.