NPPES file of Aug 9, 2026

James Arthur Royster, FNP

Nurse Practitioner · Corona, CA

James Arthur Royster, FNP is a nurse practitioner with a practice address in Corona, California, and NPI 1174936454, issued on Jun 4, 2014. Check the license (California 22668, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1174936454
Name
James Arthur Royster
Credential
FNP
Primary taxonomy
Nurse Practitioner 363L00000X
License number
22668 CA
Self-reported in NPPES; status is on the state search
Practice location
2083 Compton Ave, Corona, CA 92881
Phone
(951) 898-8515
Enumerated
Jun 4, 2014
Record last updated
Jun 6, 2018 (not updated in 8 years: call before relying on the address or phone)
Fax
(951) 898-6209
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →

Also registered at 2083 Compton Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. James Lai, DDSDentist1699897819
  2. Tejaskumar Naik, M.D.Infectious Disease Physician1255426599
  3. David Suh, M.D.Surgery Physician1639193097
  4. Seung Yang, MDPulmonary Disease Physician1710080155

Verify James Arthur Royster in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 22668    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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97% fewer Medicare Part D claims than the average nurse practitioner in 2024

30 Medicare Part D claims for 22 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.

  1. James Royster30
  2. Specialty average1,109

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.

James Arthur Royster among 8,223 nurse practitioner records in California

James Arthur Royster, FNP 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 2014, is newer than 42% of them.

  • NPI issued2014 · 42% of these records are older, 55% newer
  • In a Medicare fileYes · 65% of these records are
  • In the CMS Doctors and Clinicians fileNo · 42% of these records are
  • Record last updated2018 · 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 Corona → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Ester Ardevela, N.P.Corona, CA 928811821179565
  2. Yu CaoCorona, CA 928811891212585
  3. Christopher Hollinghurst, N.P.Corona, CA 928811306365622
  4. Suguna Jaikumar, FNPCorona, CA 928811649606914
  5. Ashleigh Moore, NPCorona, CA 928811598434201
  6. Holy Dove Paule, FNP-CCorona, CA 928811891327565
  7. Tanney AgnirEastvale, CA 928801811601685
  8. Rica Beck, FNPEastvale, CA 928801861918104

Common questions

What is James Arthur Royster, FNP's NPI number?

James Arthur Royster, FNP's National Provider Identifier (NPI) is 1174936454, issued on Jun 4, 2014. An NPI identifies a provider in billing; it is not a license.

Where is James Arthur Royster, FNP located?

The NPPES record lists a practice address at 2083 Compton Ave, Corona, CA, 92881. Phone: (951) 898-8515. Providers update this record themselves, so call before visiting.

How can I verify James Arthur Royster, FNP's license?

NPPES lists California license number 22668, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does James Arthur Royster, FNP prescribe under Medicare Part D?

In 2024, James Arthur Royster, FNP had 30 Medicare Part D claims for 22 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.