Esther Loya, P.A.C
NPI 1548557309 · Medical Physician Assistant · Montclair, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Esther Loya, P.A.C is a Medical Physician Assistant provider in Montclair, CA (NPI 1548557309).
Provider details
- NPI number
- 1548557309
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.C
- Sex
- Female
- Sole proprietor
- Yes
- License
- PA 21261 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
14 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 159 | 155 |
| Cephalexin | 89 | 87 |
| Azithromycin | 88 | 86 |
| Tramadol Hcl | 54 | 53 |
| Amoxicillin | 42 | 42 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 42 | 40 |
| Ciprofloxacin Hcl | 40 | 40 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$20 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-30
- Last updated
- 2021-11-17
- Certified
- 2021-11-17
Frequently asked questions
- What is Esther Loya's NPI number?
- Esther Loya's National Provider Identifier (NPI) is 1548557309, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Esther Loya's specialty?
- Esther Loya is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Esther Loya located?
- Esther Loya's practice location on file with NPPES is 8891 Central Ave, Montclair, CA 91763-1618.
- What is Esther Loya's phone number?
- The practice phone number listed in the NPPES registry for Esther Loya is (909) 297-3361.
- Does Esther Loya accept Medicare?
- Esther Loya is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Esther Loya's NPI active?
- Yes — Esther Loya's NPI (1548557309) is active in the NPPES registry as of the last update on 2021-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.