Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Barbara J. Lewis-Clarke

Clinical Social Worker in Oakland, CA · enumerated 2007 · practices at Alameda County.

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

National Provider Identifier

1679778559

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Barbara J. Lewis-Clarke

Sex Female

Practice address 7200 Bancroft Ave Ste 125d, Oakland, CA, 94605

Phone (510) 777-3891

Enumeration date Jun 19, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Primary

Other identifiers

Identifier	Type	State	Issuer
0108	Medicaid	CA	-

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

Is NPI 1679778559 active?

Yes, as of the latest NPPES snapshot, NPI 1679778559 is active (record last updated 2007-07-08).

How do I verify Barbara Lewis-Clarke's NPI record?

Cross-check NPI 1679778559 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.