Dr. Phyllis Mast , PhD
Psychologist • Spokane, WA
Notice of NPI Deactivation & Inactive Practice Status
According to official public domain records published by CMS (Centers for Medicare & Medicaid Services) in the National Provider Identifier (NPPES) Registry, Dr. Phyllis Mast has officially deactivated this NPI record and ceased active healthcare practice.
Professional Overview & Biography Verified Profile Summary
Dr. Phyllis Mast, PhD was a registered Psychologist practicing in Spokane, WA. Throughout an active medical career spanning 20 years, Dr. Mast provided care at the practice location at 1107 S WALL ST until profile deactivation on 2026-07-16.
Practice Location & Contact Primary Location
1107 S Wall St
Spokane, WA 992043745
Specialty Benchmarks & Practice Insights
Comparative analytics for Psychologist in Spokane, WA
Practicing in Spokane, WA (1137 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
NUCC Taxonomy Code: 103T00000X
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.
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Record deactivated on July 16, 2026
NPI status registered as active in NPPES database
Registered at 1107 S WALL ST, SPOKANE, WA 992043745 (Tel: 5097475529)
Registered at 1107 S WALL ST, SPOKANE, WA 992043745 (Tel: 5097475529)
Recorded as PHYLLIS MAST, PH.D.
Psychologist (License #1247 in WA)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
Verified patient ratings, medical care experiences, and facility photos
Sign in to leave a review for Dr. Phyllis Mast
Only verified registered users can submit ratings, post feedback, and upload facility photos.
NPI Administrative Meta
Mailing Address
1107 S Wall St
Spokane, WA 992043745
Phone: 5097475529
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.