Quick answers
- Does Maria Ruduski Downey accept Medicare assignment?
- Yes. Medicare's clinician data says Maria Ruduski Downey 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 Maria Ruduski Downey see?
- In 2024, CMS data shows 326 Original Medicare patients and 756 services for Maria Ruduski Downey. This counts Original Medicare only and measures volume, not quality.
- What is Maria Ruduski Downey's NPI number?
- 1679543664. 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 Maria Ruduski Downey, 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 | 326 |
|---|---|
| Services billed to Medicare | 756 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient complete exam of visual system (92014)212 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)121 services
- Imaging of retina (92134)111 services
- Imaging of optic nerve (92133)92 services
- Exam of visual field with extended testing (92083)77 services
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 cholesterol75%
- High blood pressure70%
- Arthritis42%
- Diabetes28%
- Ischemic heart disease21%
- Chronic kidney disease20%
Practice locations
Addresses where Maria Ruduski Downey is enrolled with Medicare (CMS data updated October 2, 2026).
- 1810 E Lincoln HwyCoatesville, PA 19320 (610) 466‑9909
- 2514 Ridge RdElverson, PA 19520 (610) 913‑0126
- 453 E Lancaster AveShillington, PA 19607 (610) 775‑3321
Group practices
Medicare enrollment lists Maria Ruduski Downey as a member of these groups (CMS data updated October 2, 2026).
- Shillington Eye Associates4 clinicians in the group
- Margaret A. Shirk O.D. and Associates Inc2 clinicians in the group
- Renny S Sardella Od PC2 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Pennsylvania
Clinicians with the same Medicare primary specialty in Pennsylvania — not a recommendation.
Other clinicians in Shillington Eye Associates
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | State University Of New York - State College Optometry |
| Graduation year | 1998 (28 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679543664 |
| 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
- 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