Katherine Barkei
Family · Oak Lawn, ILNPI 1457720682
Payments from drug & device makers
Across 83 payments — averaging $43.63 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$746
- OPKO Pharmaceuticals, LLC$556
- Amgen$464
- Ardelyx, Inc.$339
- Novo Nordisk$286
- Bayer$257
- plus $974 from 12 others
What the payments were for
- Speaking & faculty fees$241%
- Food & beverage$3,57299%
- Education$261%
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 |
|---|---|---|
| AstraZeneca | 14 | $746 |
| OPKO Pharmaceuticals, LLC | 18 | $556 |
| Amgen(2 entities) | 7 | $464 |
| Ardelyx, Inc. | 11 | $339 |
| Novo Nordisk | 7 | $286 |
| Bayer | 8 | $257 |
| Insulet Corporation | 2 | $191 |
| Medtronic | 1 | $128 |
| Lilly USA, LLC | 3 | $120 |
| Mannkind Corporation | 1 | $113 |
| Fresenius USA Marketing, Inc. | 2 | $108 |
| Travere Therapeutics, Inc. | 1 | $108 |
| Vifor Pharma, Inc. | 1 | $87 |
| Amryt Pharma Holdings Ltd | 3 | $44 |
| BD | 1 | $24 |
| Novartis | 1 | $22 |
| Sanofi-aventis U.S. LLC | 1 | $15 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $12 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$3,622 in reported general payments places this provider in the 90th percentile of 4,941 family providers in Illinois.
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 |
|---|---|---|
| VelphoroSucroferric Oxyhydroxide | 44 | $96,930 |
| XphozahTenapanor Hcl | 13 | $35,470 |
| Sevelamer Carbonate | 56 | $15,491 |
| LokelmaSodium Zirconium Cyclosilicate | 11 | $7,731 |
| Midodrine Hcl | 27 | $3,098 |
| Calcium Acetate | 20 | $2,340 |
| ProsolParenteral Amino Acid 20% No.1 | 21 | $2,063 |
| Nifedipine ErNifedipine | 46 | $1,949 |
| Cinacalcet Hcl | 15 | $1,217 |
| Atorvastatin Calcium | 62 | $785 |
| Calcitriol | 53 | $639 |
| Pantoprazole Sodium | 30 | $548 |
| Amlodipine Besylate | 65 | $529 |
| Hydralazine Hcl | 30 | $476 |
| Metoprolol Succinate | 23 | $466 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Fresenius USA Marketing, Inc.Velphoro | $108 | $96,93044 claims |
| AstraZenecaLokelma | $746 | $7,73111 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 90th percentile of 4,941 family providers in Illinois.
Other family in Oak Lawn
- Barbara KowalczykOak Lawn$74K
- Ruth CarricoChicago$582K
- Aleksandra BielawiecBarrington$373K
- Erin SieberNaperville$334K
- Jamie BroganChicago$282K
- Ashley NoethGlen Carbon$271K
- Marita KametasChicago$259K
- Shammona ClarkChicago$247K
- Amanda McKeeMount Vernon$242K
- Brooke KennardBloomington$208K
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.