Esther Loya, P.A.C
Medical Physician Assistant · Montclair, CA
Esther Loya, P.A.C is a medical physician assistant with a practice address in Montclair, California, and NPI 1548557309, issued on Jun 30, 2011. Check the license (California PA 21261, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Esther Loya
- Credential
- P.A.C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA 21261 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8891 Central Ave, Montclair, CA 91763
- Phone
- (909) 297-3361
- Enumerated
- Jun 30, 2011
- Record last updated
- Nov 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (909) 621-1397
- Medicare enrollment
- Enrolled (PECOS I20180905002399); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 8891 Central Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Joann Enderica, PAMedical Physician Assistant1992120042
- Kyungsoo Go, PA-CPhysician Assistant1720514466
- Akash Gupta, M.D.Emergency Medicine Physician1417969742
Verify Esther Loya in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA 21261Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% fewer Medicare Part D claims than the average medical physician assistant in 2024
1,030 Medicare Part D claims for 614 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. 83 claims were for opioids.
Most prescribed
- Prednisone159 claims
- Cephalexin89 claims
- Azithromycin88 claims
- Tramadol Hcl54 claims
- Amoxicillin42 claims
- Sulfamethoxazole-Trimethoprim42 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.
Industry payments in 2024: $19.58
1 payment: food and beverage; the largest payer was Hologic Sales and Service, LLC. The 16,165 providers of this specialty with any payment received $1,055.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupVictorville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Esther Loya among 3,376 medical physician assistant records in California
Esther Loya, P.A.C is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 46% of them.
- NPI issued2011 · 46% of these records are older, 49% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2010 · median 2012 among the 1,347 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 medical physician assistant records list a practice address in Montclair
They are 7 of the 1,301 NPPES records with a practice address in Montclair, and 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in Montclair → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Esther Agepogu, PA-CMontclair, CA 917631982846499
- Charinda Charoen, P.A.Montclair, CA 917631437440625
- Joann Enderica, PAMontclair, CA 917631992120042
- Michael Lance, P.A.-CMontclair, CA 917631740310531
- Martin Madrigal, PA-CMontclair, CA 917631043371636
- Jonathan Martinez, PACMontclair, CA 917631750491908
- Stephen Styadi, PHYSICIAN ASSISTANTOntario, CA 917641093024994
- Jennifer Yim, PA-COntario, CA 917621588907802
Common questions
What is Esther Loya, P.A.C's NPI number?
Esther Loya, P.A.C's National Provider Identifier (NPI) is 1548557309, issued on Jun 30, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Esther Loya, P.A.C located?
The NPPES record lists a practice address at 8891 Central Ave, Montclair, CA, 91763. Phone: (909) 297-3361. Providers update this record themselves, so call before visiting.
How can I verify Esther Loya, P.A.C's license?
NPPES lists California license number PA 21261, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Esther Loya, P.A.C prescribe under Medicare Part D?
In 2024, Esther Loya, P.A.C had 1,030 Medicare Part D claims for 614 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.