Karen S. Allgaier, FNP
Family Nurse Practitioner · Upland, CA
Karen S. Allgaier, FNP is a family nurse practitioner with a practice address in Upland, California, and NPI 1629220629, issued on Oct 21, 2008. Check the license (California NP18623, 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
- Karen S. Allgaier
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- NP18623 CA
Self-reported in NPPES; status is on the state search - Practice location
- 600 N Mountain Ave, Upland, CA 91786
- Phone
- (909) 931-7947
- Enumerated
- Oct 21, 2008
- Record last updated
- Oct 21, 2008 (not updated in 18 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 600 N Mountain Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Angela Barrios-Lucero, LMFTMarriage & Family Therapist1740443621
- Mary Berg, NPObstetrics & Gynecology Nurse Practitioner1336352939
- Paul Chang, DDSDentist1760698914
- Lisa Chong, MDObstetrics & Gynecology Physician1467539304
- Kay Crawford, NPFamily Nurse Practitioner1205115425
- Patricia Fromer, M.S.Marriage & Family Therapist1083747158
Verify Karen S. Allgaier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP18623Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80 family nurse practitioner records list a practice address in Upland
They are 80 of the 1,846 NPPES records with a practice address in Upland, and 16,966 family nurse practitioner records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 80 in Upland → All 16,966 in California → Every provider in Upland →
Other family nurse practitioner records in California
- Danielle Aaroe, FAMILY NURSE PRACTITOroville, CA1750767083
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- Orly Aaron, NPSan Francisco, CA1376912451
- Paris Gilbert Russ AaronSacramento, CA1871079111
- Tiffanne Aaronsen, FNPIndio, CA1568191807
- Alvin Joseph Abad, FNP-CSan Francisco, CA1154919306
- Frances Abad, FNPLos Angeles, CA1053504514
- Nnenna AbaezeLong Beach, CA1457820763
- Raymond Abagat, FNPTorrance, CA1306685821
- Ashley AbalCastaic, CA1740140698
Common questions
What is Karen S. Allgaier, FNP's NPI number?
Karen S. Allgaier, FNP's National Provider Identifier (NPI) is 1629220629, issued on Oct 21, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Karen S. Allgaier, FNP located?
The NPPES record lists a practice address at 600 N Mountain Ave, Upland, CA, 91786. Phone: (909) 931-7947. Providers update this record themselves, so call before visiting.
How can I verify Karen S. Allgaier, FNP's license?
NPPES lists California license number NP18623, 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.