Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1487879268 Individual Practitioner Female Practitioner

Dr. Judith Linzer , PhD

Psychologist - Forensic • Castro Valley, CA

Professional Overview & Biography Verified Profile Summary

Dr. Judith Linzer, PhD is a registered healthcare professional specializing in Psychologist - Forensic in Castro Valley, CA. Practice services are available at 20200 REDWOOD ROAD under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

20200 Redwood Road
Suite 2

Castro Valley, CA 94546

Telephone 5108878819
Fax 5106557974
Associated Practice Facility / Clinic
🏢 Sang Shen Acupuncture, Inc. Facility NPI 1922459809

Specialty Benchmarks & Practice Insights

Comparative analytics for Psychologist - Forensic in Castro Valley, CA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 10.5 Yrs
State Avg: 22.7 Yrs
Regional Practice Density
1 Specialists

Practicing in Castro Valley, CA (267 Statewide)

Telehealth Adoption Rate
0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Psychologist - Forensic Primary Specialty

NUCC Taxonomy Code: 103TF0200X

State License CA PSY9833

A psychologist whose specialty is characterized by activities primarily intended to provide professional psychological expertise within the judicial and legal systems.

Psychologist

NUCC Taxonomy Code: 103T00000X

State License CA PSY9833

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.

Psychologist - Clinical

NUCC Taxonomy Code: 103TC0700X

State License CA PSY9833

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.

Psychologist - Clinical Child & Adolescent

NUCC Taxonomy Code: 103TC2200X

State License CA PSY9833

A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents within their social context. Of particular importance to the specialty of clinical child psychology is an understanding of the basic psychological needs of children and adolescents, and how the family and other social contexts influence the socio-emotional adjustment, cognitive development, behavioral adaptation and health status of children and adolescents.

Psychologist - Family

NUCC Taxonomy Code: 103TF0000X

State License CA PSY9833

A psychologist whose specialty is founded on principles of systems theory with the interpersonal system of the family the focus of assessment, intervention and research.

Additional State Medicaid & Healthcare Payer Identifiers

Commercial Insurance / Payer ID Mnn
075155

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

1 Associated Practitioners
Carolyn Ricketts , LCSW

Social Worker - Clinical

NPI 1538557459

Licensed Clinical Social Worker

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 08, 2007

Registered at 20200 REDWOOD ROAD, SUITE 2, CASTRO VALLEY, CA 94546 (Tel: 5108878819)

📍
Updated Business Mailing Address July 08, 2007

Registered at 4096 PIEDMONT AVE, SUITE 320, OAKLAND, CA 94611 (Tel: 5108878819)

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as JUDITH LINZER, PHD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Psychologist (License #PSY9833 in CA)

🟢
Initial NPI Registration & Enumeration April 16, 2007

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1487879268
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: April 16, 2007
Last Update: September 11, 2025
Sole Proprietor: No

Mailing Address

4096 Piedmont Ave, Suite 320

Oakland, CA 94611

Phone: 5108878819

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

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.