Stephen Styadi, PHYSICIAN ASSISTANT
NPI 1093024994 · Medical Physician Assistant · Ontario, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Styadi, PHYSICIAN ASSISTANT is a Medical Physician Assistant provider in Ontario, CA (NPI 1093024994).
Provider details
- NPI number
- 1093024994
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PHYSICIAN ASSISTANT
- Sex
- Male
- Sole proprietor
- Yes
- License
- PA21209 (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 tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 46 | 46 |
| Lisinopril | 33 | 17 |
| Ciclopirox | 27 | 16 |
| Doxycycline Monohydrate | 24 | 24 |
| Omeprazole | 22 | 16 |
| Amlodipine Besylate | 21 | — |
| Atorvastatin Calcium | 20 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-09-27
- Last updated
- 2021-10-24
- Certified
- 2021-10-24
Frequently asked questions
- What is Stephen Styadi's NPI number?
- Stephen Styadi's National Provider Identifier (NPI) is 1093024994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Styadi's specialty?
- Stephen Styadi is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Stephen Styadi located?
- Stephen Styadi's practice location on file with NPPES is 1760 E Flora St, Ontario, CA 91764-4458.
- What is Stephen Styadi's phone number?
- The practice phone number listed in the NPPES registry for Stephen Styadi is (909) 641-5703.
- Does Stephen Styadi accept Medicare?
- Stephen Styadi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Styadi's NPI active?
- Yes — Stephen Styadi's NPI (1093024994) is active in the NPPES registry as of the last update on 2021-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.