Quick answers
- Does Marius Gradianu accept Medicare assignment?
- Yes. Medicare's clinician data says Marius Gradianu 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 Marius Gradianu see?
- In 2024, CMS data shows 581 Original Medicare patients and 3,136 services for Marius Gradianu. This counts Original Medicare only and measures volume, not quality.
- What is Marius Gradianu's NPI number?
- 1144665878. 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 Marius Gradianu, 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 | 581 |
|---|---|
| Services billed to Medicare | 3,136 |
| Different services or procedures | 50 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)466 services
- Imaging of retina (92134)369 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)357 services
- Measurement of corneal curvature and depth of eye (92136)184 services
- Removal of cataract with insertion of prosthetic lens (66984)160 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 cholesterol74%
- High blood pressure71%
- Arthritis42%
- Diabetes34%
- Ischemic heart disease25%
- Anxiety22%
Practice locations
Addresses where Marius Gradianu is enrolled with Medicare (CMS data updated October 2, 2026).
- 1960 Springbrook Square Dr, Suite 110Naperville, IL 60564 (630) 833‑9621
Group practices
Medicare enrollment lists Marius Gradianu as a member of this group (CMS data updated October 2, 2026).
- Kovach Eye Institute Ltd7 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Naperville
Clinicians with the same Medicare primary specialty in Naperville, IL — not a recommendation.
Other clinicians in Kovach Eye Institute Ltd
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Kansas City University Of Med & Biosciences, College Of Osteo Med |
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1144665878 |
| 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