Dr. Alec Norman Mendelson, PH.D.

Dr. Alec Norman Mendelson is a Clinical Psychologist provider (Psychologist) practicing in Gresham, OR, registered in the NPPES registry with NPI 1508848383 since 2005. The credential PHD stands for Doctor of Philosophy. Practices at Endodontic Specialty Group, P.C. (listed at the same practice address in NPPES).

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NPI	1508848383
Entity type	Individual (Type 1)
Name	Dr. Alec Norman Mendelson
Credential	PH.D.
Sex	Male
Practice address	1550 NW EASTMAN PKWY, SUITE 280, Gresham, OR, 97030
Phone	5036654357
Fax	5036653260
Enumeration date	2005-11-16
Last updated in NPPES	2023-09-06

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103TC0700X	Clinical Psychologist	Primary	787	OR

PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Copy-ready billing details

Provider: Alec Mendelson, PH.D.
NPI: 1508848383
Taxonomy: 103TC0700X (Clinical Psychologist)
Address: 1550 NW EASTMAN PKWY, SUITE 280, Gresham, OR, 97030

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1811978760	Janet Thomson	Individual	Clinical Social Worker	Gresham, OR
1760595441	Sherwin Moscow	Individual	Addiction (Substance Use Disorder) Counselor	Gresham, OR
1174638167	Gail Reynolds	Individual	Mental Health Counselor	Gresham, OR
1457466534	Jana Schweitzer	Individual	Mental Health Counselor	Gresham, OR
1306956453	Lewis Sprunger	Individual	Child & Adolescent Psychiatry Physician	Gresham, OR
1417059270	Scott Ruplin	Individual	Clinical Social Worker	Gresham, OR
1811091218	Margot David	Individual	Clinical Social Worker	Gresham, OR
1861561508	Dale Barker	Individual	Endodontics	Gresham, OR

Verify this record

Cross-check NPI 1508848383 against the authoritative CMS record: view Dr. Alec Norman Mendelson on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Alec Mendelson?

Alec Mendelson is registered in NPPES with the primary taxonomy of Clinical Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2023-09-06.