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

DR. MARK STANLEY SEELEY
NPI 1124075015
Psychologist in Tacoma, WA

Active since May 27, 2006
9601 STEILACOOM BLVD SW, TACOMA, WA 98498(253) 582-8900(253) 756-3974 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Mark Stanley Seeley NPPES

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

DR. MARK STANLEY SEELEY (NPI 1124075015) is an individual psychologist in Tacoma, Washington, licensed in Washington (PY00000433) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1124075015
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameDR. MARK STANLEY SEELEY
Location Address9601 STEILACOOM BLVD SWTacoma, WA 98498-7213
Mailing Address9601 Steilacoom Blvd SwTacoma, WA 98498-7213 · (253) 582-8900 · Fax (253) 756-3974
Fax(253) 756-3974
Sole ProprietorNo
Enumeration DateMay 27, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1124075015 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License Licensed in WA · PY00000433
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
9601 STEILACOOM BLVD SW, Tacoma, WA 98498

Other Providers at the Same Location NPPES 20

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

Psychiatry & Neurology (Psychiatry)
9601 STEILACOOM BLVD SW
TACOMA, WA 98498
Psychologist
9601 STEILACOOM BLVD SW
TACOMA, WA 98498
Dentist (General Practice)
9601 STEILACOOM BLVD SW
LAKEWOOD, WA 98498
Community/Behavioral Health
9601 STEILACOOM BLVD SW, BLDG 27
TACOMA, WA 98498
Internal Medicine
9601 STEILACOOM BLVD SW
TACOMA, WA 98498
Psychologist
9601 STEILACOOM BLVD SW, WESTERN STATE HOSPITAL
TACOMA, WA 98498
Social Worker (Clinical)
9601 STEILACOOM BLVD SW
LAKEWOOD, WA 98498
Occupational Therapist
9601 STEILACOOM BLVD SW
LAKEWOOD, WA 98498

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 Mark Seeley's NPI number?

The NPI number for Mark Seeley is 1124075015. It was assigned to this individual provider in the NPPES registry on May 27, 2006.

Where is Mark Seeley located?

Mark Seeley practices at 9601 Steilacoom Blvd SW, Tacoma, WA 98498. The listed phone number is (253) 582-8900.

What is Mark Seeley's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

When was this NPI record last updated?

The NPPES record for Mark Seeley was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 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.