Irene L. Belknapp, NP
Nurse Practitioner · Rialto, CA
Irene L. Belknapp, NP is a nurse practitioner with a practice address in Rialto, California, and NPI 1275556706, issued on Jul 25, 2006. Check the license (California NP6678, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Irene L. Belknapp
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- NP6678 CA
Self-reported in NPPES; status is on the state search - Practice location
- 850 E Foothill Blvd, Rialto, CA 92376
- Phone
- (855) 422-8029
- Enumerated
- Jul 25, 2006
- Record last updated
- Apr 30, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicaid ID
- RN452535 CA
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Also registered at 850 E Foothill Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Irene L. Belknapp in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP6678Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average nurse practitioner in 2024
542 Medicare Part D claims for 92 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
Most prescribed
- Metformin Hcl36 claims
- Atorvastatin Calcium33 claims
- Amlodipine Besylate26 claims
- Lisinopril25 claims
- Hydrochlorothiazide22 claims
- Oxybutynin Chloride19 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Irene L. Belknapp among 8,223 nurse practitioner records in California
Irene L. Belknapp, NP is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 82% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 42% of these records are
- Record last updated2015 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in California
There are 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in Rialto → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Rose Callender, FNP-BCRialto, CA 923761669896551
- Patrice Hart, FNP-CRialto, CA 923761659781078
- Stephanie Lewis, CPNPRialto, CA 923761720096944
- Ana Meza, NPRialto, CA 923761750024816
- Sierra Dunn, NPRedlands, CA 923751447962592
- Wileen SantosRialto, CA 923771295692515
- Sara Allen-DutcherRedlands, CA 923741558983536
- Sabrina GomezRedlands, CA 923741710720982
Common questions
What is Irene L. Belknapp, NP's NPI number?
Irene L. Belknapp, NP's National Provider Identifier (NPI) is 1275556706, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Irene L. Belknapp, NP located?
The NPPES record lists a practice address at 850 E Foothill Blvd, Rialto, CA, 92376. Phone: (855) 422-8029. Providers update this record themselves, so call before visiting.
How can I verify Irene L. Belknapp, NP's license?
NPPES lists California license number NP6678, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Irene L. Belknapp, NP prescribe under Medicare Part D?
In 2024, Irene L. Belknapp, NP had 542 Medicare Part D claims for 92 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.