Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Barbara Lowenstein, AMFT

Mental Health Counselor in San Mateo, CA · enumerated 2023.

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

National Provider Identifier

1962193094

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Registry record

Entity type Individual (Type 1)

Name Barbara Lowenstein

Credential AMFT

Sex Female

Practice address 307 2nd Ave, San Mateo, CA, 94401

Phone (650) 405-7022

Enumeration date May 18, 2023

Last updated in NPPES May 18, 2023

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 136748 (CA) Primary

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.

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Frequently asked questions

How do I verify Barbara Lowenstein's NPI record?

Cross-check NPI 1962193094 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1962193094 active?

Yes, as of the latest NPPES snapshot, NPI 1962193094 is active (record last updated 2023-05-18).

Other providers at this practice address

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Renee Finnicum Professional Counselor · San Mateo, CA NPI 1376817270 Laura Portillo Counselor · San Mateo, CA NPI 1578174066 Shelly Holland Marriage & Family Therapist · San Mateo, CA NPI 1447100037

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-18.