Quick answers
- Does Jonathan R. Pirnazar accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan R. Pirnazar 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 Jonathan R. Pirnazar see?
- In 2024, CMS data shows 595 Original Medicare patients and 2,149 services for Jonathan R. Pirnazar. This counts Original Medicare only and measures volume, not quality.
- What is Jonathan R. Pirnazar's NPI number?
- 1962436410. 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 Jonathan R. Pirnazar, 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 | 595 |
|---|---|
| Services billed to Medicare | 2,149 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Removal of cataract with insertion of prosthetic lens (66984)403 services
- Measurement of corneal curvature and depth of eye (92136)358 services
- Imaging of retina (92134)290 services
- New patient complete exam of visual system (92004)287 services
- Ct scan of cornea (92025)212 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 pressure61%
- Arthritis43%
- Diabetes21%
- Ischemic heart disease21%
- Anxiety18%
Practice locations
Addresses where Jonathan R. Pirnazar is enrolled with Medicare (CMS data updated October 2, 2026).
- 24022 Calle De La Plata, Suite 300Laguna Hills, CA 92653 (949) 951‑1457
Group practices
Medicare enrollment lists Jonathan R. Pirnazar as a member of this group (CMS data updated October 2, 2026).
- Thomas S Tooma M D A Professional Corporation31 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Laguna Hills
Clinicians with the same Medicare primary specialty in Laguna Hills, CA — not a recommendation.
Other clinicians in Thomas S Tooma M D A Professional Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1962436410 |
| 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