Quick answers
- Does David J. Fleszar accept Medicare assignment?
- Yes. Medicare's clinician data says David J. Fleszar 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 David J. Fleszar see?
- In 2024, CMS data shows 7,598 Original Medicare patients and 29,122 services for David J. Fleszar. This counts Original Medicare only and measures volume, not quality.
- What is David J. Fleszar's NPI number?
- 1083704845. 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 David J. Fleszar, 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 | 7,598 |
|---|---|
| Services billed to Medicare | 29,122 |
| Different services or procedures | 122 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)14,273 services
- Injection, gadoterate meglumine, 0.1 ml (A9575)3,550 services
- X-ray of chest, 2 views (71046)2,159 services
- Screening mammography (77067)2,120 services
- Screening 3d breast mammography (77063)2,111 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 blood pressure75%
- High cholesterol75%
- Arthritis59%
- Ischemic heart disease36%
- Depression31%
- Chronic kidney disease30%
Practice locations
Addresses where David J. Fleszar is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 25; the Medicare profile lists all.
- 1126 S 14th StFernandina Beach, FL 32034 (904) 432‑3061
- 1128 S 14th StFernandina Beach, FL 32034 (904) 420‑6105
- 1132 S 14th StFernandina Beach, FL 32034 (904) 277‑4690
- 11513 N Main StJacksonville, FL 32218 (904) 751‑6200
- 13813 Metro PkwyFort Myers, FL 33912 (239) 936‑1343
Group practices
Medicare enrollment lists David J. Fleszar as a member of this group (CMS data updated October 2, 2026).
- Millennium Physician Group LLC982 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Fernandina Beach
Clinicians with the same Medicare primary specialty in Fernandina Beach, FL — not a recommendation.
Other clinicians in Millennium Physician Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1987 (39 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1083704845 |
| 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