Josephine Guerrero Billington, RN, NP
Primary Care Nurse Practitioner · Berkeley, CA
Josephine Guerrero Billington, RN, NP is a primary care nurse practitioner with a practice address in Berkeley, California, and NPI 1215007745, issued on Nov 9, 2006. Check the license (California RN235849 NP6732, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Josephine Guerrero Billington
- Credential
- RN, NP
- Primary taxonomy
- Primary Care Nurse Practitioner 363LP2300X
- License number
- RN235849 NP6732 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2222 Bancroft Ext, Berkeley, CA 94720
- Phone
- (510) 643-5400
- Enumerated
- Nov 9, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (510) 642-6428
- Entity
- Type 1 · individual
Also registered at 2222 Bancroft Ext
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Josephine Guerrero Billington in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license RN235849 NP6732Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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Common questions
What is Josephine Guerrero Billington, RN, NP's NPI number?
Josephine Guerrero Billington, RN, NP's National Provider Identifier (NPI) is 1215007745, issued on Nov 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Josephine Guerrero Billington, RN, NP located?
The NPPES record lists a practice address at 2222 Bancroft Ext, Berkeley, CA, 94720. Phone: (510) 643-5400. Providers update this record themselves, so call before visiting.
How can I verify Josephine Guerrero Billington, RN, NP's license?
NPPES lists California license number RN235849 NP6732, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.