Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

ISABELLA WILLIAMS
NPI 1457265027
Psychologist in Pittsburgh, PA

Active since September 30, 2026
3333 5TH AVE, PITTSBURGH, PA 15213(412) 578-6000 Get Directions Write a Review

NPPES record added: September 30, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

About Isabella Williams NPPES

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

ISABELLA WILLIAMS (NPI 1457265027) is an individual psychologist in Pittsburgh, Pennsylvania and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1457265027
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameISABELLA WILLIAMS
Location Address3333 5TH AVEPittsburgh, PA 15213-3165
Mailing Address318 Winter RdNew Castle, PA 16101-1029
Sole ProprietorYes
Enumeration DateSeptember 30, 2026
NPPES CertifiedSeptember 30, 2026
✔ NPI 1457265027 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
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.
3333 5TH AVE, Pittsburgh, PA 15213

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.

Psychologist
3333 5TH AVE
PITTSBURGH, PA 15213
Student in an Organized Health Care Education/Training Program
3333 5TH AVE
PITTSBURGH, PA 15213
Student in an Organized Health Care Education/Training Program
3333 5TH AVE
PITTSBURGH, PA 15213
Student in an Organized Health Care Education/Training Program
3333 5TH AVE
PITTSBURGH, PA 15213
Student in an Organized Health Care Education/Training Program
3333 5TH AVE
PITTSBURGH, PA 15213
Nurse Practitioner (Family)
3333 5TH AVE
PITTSBURGH, PA 15213
Psychologist
3333 5TH AVE
PITTSBURGH, PA 15213
Student in an Organized Health Care Education/Training Program
3333 5TH AVE
PITTSBURGH, PA 15213

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 Isabella Williams's NPI number?

The NPI number for Isabella Williams is 1457265027. It was assigned to this individual provider in the NPPES registry on September 30, 2026.

Where is Isabella Williams located?

Isabella Williams practices at 3333 5th Ave, Pittsburgh, PA 15213. The listed phone number is (412) 578-6000.

What is Isabella Williams'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 Isabella Williams was last updated on September 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.