Frederick Fleszler, MD
Nephrology · Allentown, PANPI 1588758353
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 2 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. That places this record below the midpoint for nephrology clinicians in PA, where the typical reported total is $612.
Across 2 payments — averaging $22.23 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Apellis Pharmaceuticals, Inc.$26
- Fresenius USA Marketing, Inc.$19
Across 49 payments — averaging $4956.88 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- CSL Behring$137K
- Otsuka Pharmaceutical Development & Commercialization, Inc.$90K
- Alnylam Pharmaceuticals Inc.$16K
What the payments were for
- Food & beverage$44100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Apellis Pharmaceuticals, Inc. | 1 | $26 |
| Fresenius USA Marketing, Inc. | 1 | $19 |
How this compares
$44 in reported general payments places this provider in the 10th percentile of 586 nephrology providers in Pennsylvania.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| VeltassaPatiromer Calcium Sorbitex | 51 | $52,624 |
| LokelmaSodium Zirconium Cyclosilicate | 17 | $18,691 |
| FarxigaDapagliflozin Propanediol | 17 | $12,879 |
| Lanthanum Carbonate | 15 | $9,880 |
| Sevelamer Carbonate | 17 | $3,815 |
| Calcitriol | 150 | $1,707 |
| Amlodipine Besylate | 187 | $1,653 |
| Valsartan | 73 | $1,577 |
| Nifedipine ErNifedipine | 34 | $1,454 |
| Losartan Potassium | 114 | $1,146 |
| Calcium Acetate | 23 | $1,085 |
| Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide | 27 | $1,006 |
| Lisinopril | 123 | $863 |
| Doxazosin Mesylate | 60 | $634 |
| Spironolactone | 67 | $493 |
Paid to pharmacies, not to this prescriber.
Other nephrology in Allentown
- Nelson KopytAllentown$949K
- Shawn HazlettAllentown$39K
- Christopher GislerPittsburgh$757K
- Rakesh GulatiPhiladelphia$657K
- Raymond TownsendPhiladelphia$357K
- Prince AnandDanville$331K
- Ellie KelepourisPhiladelphia$287K
- Jonathan DiamondHarrisburg$249K
- Abdallahsassine GearaPhiladelphia$225K
- Khaled NasharPittsburgh$198K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.