Dr. Freya J. Silverstein, MD
Nephrology (Kidney) (Nephrology Physician)
- Medicare participating
At a glance
- Medical school
- State University of New York Downstate Medical Center (1983)
- Years since graduation
- 43
- In the NPI registry since
- 2005
- Medicare patients seen, 2024
- 745
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1983Medical school: State University of New York Downstate Medical Center
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Nephrology Physician primary
FL license ME0046801
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Bethesda Hospital East Boynton Beach, FL
- HCA Florida Jfk Hospital Atlantis, FL
- Wellington Regional Medical Center Wellington, FL
- HCA Florida PAlms West Hospital Loxahatchee, FL
Medical groups
- Florida Kidney Physicians LLC (169 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 745
- Services billed
- 4,564
- Patients’ average age
- 77
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 854 | 354 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 638 | 220 |
| Dialysis services, 4 or more physician visits per month (20 years or older) | 438 | 54 |
| Hemodialysis procedure with physician evaluation | 182 | 80 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 164 | 147 |
| Home dialysis services per month (20 years or older) | 114 | 21 |
| Established patient office or other outpatient visit, 40-54 minutes | 96 | 76 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 86 | 47 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 66 | 45 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 46 | 43 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Losartan Potassium Other prescribers in Atlantis, FL | 304 |
| Kerendia (finerenone) Other prescribers in Atlantis, FL | 126 |
| Farxiga (dapagliflozin propanediol) Other prescribers in Atlantis, FL | 125 |
| Furosemide Other prescribers in Atlantis, FL | 125 |
| Allopurinol Other prescribers in Atlantis, FL | 113 |
| Calcitriol Other prescribers in Atlantis, FL | 97 |
| Amlodipine Besylate Other prescribers in Atlantis, FL | 94 |
| Jardiance (empagliflozin) Other prescribers in Atlantis, FL | 92 |
| Atorvastatin Calcium Other prescribers in Atlantis, FL | 89 |
| Torsemide Other prescribers in Atlantis, FL | 63 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 3 companies reported 5 payments worth $102 in total to this clinician.
| Fresenius USA Marketing, Inc. | $39.23 |
|---|---|
| Amgen Inc. | $34.70 |
| Travere Therapeutics, Inc. | $27.58 |
| Food and Beverage | $101 |
|---|---|
| Education | $0.39 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Travere Therapeutics, Inc. Nov 4, 2025 | Education Filspari · Kidney Disease · in-kind | $0.39 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.