Quick answers
- Does Donald J. Beilstein accept Medicare assignment?
- Yes. Medicare's clinician data says Donald J. Beilstein 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 Donald J. Beilstein see?
- In 2024, CMS data shows 701 Original Medicare patients and 2,234 services for Donald J. Beilstein. This counts Original Medicare only and measures volume, not quality.
- What is Donald J. Beilstein's NPI number?
- 1619141058. 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 Donald J. Beilstein, 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 | 701 |
|---|---|
| Services billed to Medicare | 2,234 |
| Different services or procedures | 29 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient complete exam of visual system (92014)621 services
- Photography of the retina (92250)602 services
- Exam of visual field with extended testing (92083)162 services
- Imaging of retina (92134)149 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)126 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 pressure62%
- Arthritis47%
- Ischemic heart disease18%
- Anxiety16%
- Osteoporosis16%
Practice locations
Addresses where Donald J. Beilstein is enrolled with Medicare (CMS data updated October 2, 2026).
- 11250 Pleasant Valley RdPenn Valley, CA 95946 (530) 432‑2020
Specialties
- Optometryprimary
Other optometrists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Southern California College Of Optometry |
| Graduation year | 1982 (44 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619141058 |
| 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