NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Alissa Greenberg Psychology, PC

Developmental Disabilities Clinic/Center in Oakland, CA · enumerated 2020 · authorized official Alissa Greenberg, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1023642147

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Alissa Greenberg Psychology, PC
Other name <Unavail>
Practice address 6065 Chabot Rd, Oakland, CA, 94618
Enumeration date Feb 27, 2020
Last updated in NPPES Jul 8, 2021

Taxonomy & classification

261QD1600X Developmental Disabilities Clinic/Center Ambulatory Health Care Facilities Primary
261QM0801X Mental Health Clinic/Center (Including Community Mental Health Center) Ambulatory Health Care Facilities Secondary

Authorized official

Name Alissa Greenberg
Title President

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for Alissa Greenberg Psychology, PC?
NPPES lists Alissa Greenberg (President) as the authorized official for this organization.
What is the NPI number for Alissa Greenberg Psychology, PC?
The NPI for Alissa Greenberg Psychology, PC is 1023642147, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-08.