Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Gregory Seth Alter, PHD

Individual provider Clinical Neuropsychologist · NPI 1528168366

Dr. Gregory Seth Alter, PHD is a Clinical Psychologist in Oakland, California. Qualified in 1979, 47 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
47
Licensed in
CA
In the registry since
2006
Specialties on file
11
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

5666 Telegraph Ave
Oakland, CA 94609-1708
Phone: (510) 545-6463
Fax: (510) 217-3588
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PSY7422 (CA)
Clinical Neuropsychologist Taxonomy 103G00000X · Licence PSY7422 (CA)
Addiction (Substance Use Disorder) Psychologist Taxonomy 103TA0400X · Licence PSY7422 (CA)
Adult Development & Aging Psychologist Taxonomy 103TA0700X · Licence PSY7422 (CA)
Cognitive & Behavioral Psychologist Taxonomy 103TB0200X · Licence PSY7422 (CA)
Clinical Child & Adolescent Psychologist Taxonomy 103TC2200X · Licence PSY7422 (CA)
Forensic Psychologist Taxonomy 103TF0200X · Licence PSY7422 (CA)
Health Service Psychologist Taxonomy 103TH0100X · Licence PSY7422 (CA)
Psychologist Taxonomy 103T00000X · Licence PSY7422 (CA)
School Psychologist Taxonomy 103TS0200X · Licence PSY7422 (CA)
Marriage & Family Therapist Taxonomy 106H00000X · Licence PSY7422 (CA)

Record details

NPI number1528168366
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedSeptember 22, 2006
Last updated in NPPESAugust 8, 2022
Certification dateAugust 8, 2022
Mailing address3048 Richmond Blvd, Oakland, CA 94611-5847

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1979 (47 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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