NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Josephine Guerrero Billington, RN, NP

Primary Care Nurse Practitioner in Berkeley, CA · enumerated 2006.

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

National Provider Identifier

1215007745

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Registry record

Entity type Individual (Type 1)
Name Ms. Josephine Guerrero Billington
Credential RN, NP
Sex Female
Practice address 2222 Bancroft Ext, Berkeley, CA, 94720
Phone (510) 643-5400
Fax (510) 642-6428
Enumeration date Nov 9, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN235849 NP6732 (CA) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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

Is NPI 1215007745 active?
Yes, as of the latest NPPES snapshot, NPI 1215007745 is active (record last updated 2007-07-08).
How do I verify Josephine Billington's NPI record?
Cross-check NPI 1215007745 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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