Quick answers
- Does Sharon S. Stannislaus accept Medicare assignment?
- Yes. Medicare's clinician data says Sharon S. Stannislaus accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Sharon S. Stannislaus see?
- In 2024, CMS data shows 20 Original Medicare patients and 35 services for Sharon S. Stannislaus. This counts Original Medicare only and measures volume, not quality.
- What is Sharon S. Stannislaus's NPI number?
- 1891301214. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Sharon S. Stannislaus, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 20 |
|---|---|
| Services billed to Medicare | 35 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Diabetes60%
Hospitals where Sharon S. Stannislaus works
Medicare's Facility Affiliation Data lists Sharon S. Stannislaus at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Pomona Valley Hospital Medical CenterPomona, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050231
Practice locations
Addresses where Sharon S. Stannislaus is enrolled with Medicare (CMS data updated October 2, 2026).
- 1798 N Garey AvePomona, CA 91767 (909) 865‑9500
- 255 E Bonita AvePomona, CA 91767 (909) 593‑3550
- 255 E Bonita Ave, Bldg 9Pomona, CA 91767
Group practices
Medicare enrollment lists Sharon S. Stannislaus as a member of this group (CMS data updated October 2, 2026).
- Scott C Lederhaus MD and Lew B Disney MD PRT Lederhaus Scott C Gen PTR14 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Pomona
Clinicians with the same Medicare primary specialty in Pomona, CA — not a recommendation.
Other clinicians in Scott C Lederhaus MD and Lew B Disney MD PRT Lederhaus Scott C Gen PTR
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891301214 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians