Medicare Enrolled
Dr. Bozena Witek, MD
Hematology & Oncology · Chicago, IL
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Witek from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Witek
Dr. Bozena Witek is a hematology & oncology specialist in Chicago, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Witek performed 49,075 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Witek received a total of $13,656 from 79 pharmaceutical and/or device companies across 620 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Witek is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years of NPI registration
▲ Top 20% volume in IL
$13,656 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗49,075
Medicare services
Top 20% in IL for hematology & oncology
Not available
Unique patients (not deduplicated)
$23
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Pembrolizumab injection (Keytruda) | 16,800 | $43 | $137 |
| Anti-nausea injection (fosaprepitant) An injection of fosaprepitant, a medication used to prevent nausea and vomiting. |
16,500 | $0 | $6 |
| Denosumab injection (Prolia/Xgeva) | 5,100 | $18 | $68 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
1,490 | $0 | $1 |
| Anti-nausea injection (ondansetron/Zofran) | 1,342 | $0 | $3 |
| Anti-nausea injection (Aloxi/palonosetron) | 1,290 | $1 | $114 |
| Injection, leucovorin calcium, per 50 mg | 1,203 | $3 | $25 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
782 | $100 | $231 |
| Fluorouracil injection, 500 mg Administration of a 500 mg dose of fluorouracil medication via injection. |
781 | $2 | $13 |
| Pegfilgrastim-apgf injection An injection of pegfilgrastim-apgf, a biosimilar medication. The dose specified is 0.5 mg. |
768 | $93 | $824 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
334 | $107 | $686 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
307 | $11 | $93 |
| Additional sequential IV infusion, 1 hour or less This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less. |
291 | $23 | $152 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
278 | $7 | $431 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
271 | $13 | $105 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
241 | $66 | $157 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
166 | $62 | $168 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
116 | $23 | $156 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
90 | $1 | $7 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
86 | $145 | $325 |
| Enhanced Oncology Model monthly payment This code represents the monthly enhanced oncology services payment under the Enhancing Oncology Model. It covers the administrative payment for enhanced services provided to eligible patients. |
86 | $76 | $70 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
85 | $50 | $304 |
| Intravenous infusion of new drug or substance, 1 hour or less This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less. |
82 | $53 | $334 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
79 | $59 | $205 |
| Intravenous push injection of new drug or substance A healthcare provider injects a new medication or substance directly into a vein using a push technique. |
78 | $46 | $281 |
| IV chemotherapy initiation with community continuation Initiation of an intravenous chemotherapy infusion in a clinic using clinic supplies, with continuation of the infusion in a community setting such as home or assisted living. |
72 | $213 | $1,726 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
56 | $109 | $297 |
| Intravenous hydration infusion, 31-60 minutes Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes. |
51 | $25 | $249 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
46 | $1 | $17 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
40 | $1 | $9 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
34 | $145 | $412 |
| Irrigation of implanted venous access device This procedure involves flushing an implanted venous access device to clear blockages or maintain patency. It ensures the device remains functional for delivering medications or fluids. |
32 | $20 | $111 |
| Normal saline infusion, 1000 cc Administration of 1000 cc of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater solution. |
30 | $2 | $19 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
23 | $135 | $343 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
23 | $99 | $232 |
| New patient office visit, complex (60-74 min) | 22 | $167 | $432 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
1.8% high complexity
95.0% medium
3.2% routine
Industry Payment Transparency
Open Payments through 2024 ↗$13,656
Total received (2018-2024)
Avg $1,951/year across 7 years
Top 26% in IL for hematology & oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
79
Companies
620
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$2,805
2023
$2,575
2022
$1,810
2021
$1,838
2020
$822
2019
$2,145
2018
$1,660
Payments by company (2024)
Novartis Pharmaceuticals Corporation
$483
PFIZER INC.
$246
Celgene Corporation
$177
AstraZeneca Pharmaceuticals LP
$149
E.R. Squibb & Sons, L.L.C.
$134
Merck Sharp & Dohme LLC
$131
Astellas Pharma US Inc
$118
ABBVIE INC.
$117
Gilead Sciences, Inc.
$111
Eisai Inc.
$107
Daiichi Sankyo Inc.
$94
Amneal Pharmaceuticals LLC
$87
GlaxoSmithKline, LLC.
$80
Incyte Corporation
$72
Takeda Pharmaceuticals U.S.A., Inc.
$58
Janssen Biotech, Inc.
$57
Octapharma USA, Inc.
$53
Mirati Therapeutics, Inc.
$51
SERVIER PHARMACEUTICALS LLC
$48
Menarini Silicon Biosystems, Inc.
$48
JAZZ PHARMACEUTICALS INC.
$36
Regeneron Healthcare Solutions, Inc.
$34
Boston Scientific Corporation
$32
Tempus AI, Inc
$30
Bayer Healthcare Pharmaceuticals Inc.
$30
Pharmacosmos Therapeutics Inc.
$25
Kyowa Kirin, Inc.
$25
Karyopharm Therapeutics Inc.
$24
TAIHO ONCOLOGY, INC.
$24
SpringWorks Therapeutics, Inc.
$23
Azurity Pharmaceuticals, Inc.
$23
GENZYME CORPORATION
$21
Fennec Pharmaceuticals, Inc.
$18
ADC Therapeutics America, Inc.
$18
Biocon Biologics Inc
$16
Iovance Biotherapeutics, Inc.
$6
Top 3 companies account for 32.3% of 2024 payments
All-time payments by company (2018-2024) ›
Novartis Pharmaceuticals Corporation
$1,749
Genentech USA, Inc.
$1,078
AstraZeneca Pharmaceuticals LP
$1,043
PFIZER INC.
$788
Celgene Corporation
$731
Merck Sharp & Dohme Corporation
$543
E.R. Squibb & Sons, L.L.C.
$496
Gilead Sciences, Inc.
$496
Amgen Inc.
$372
Merck Sharp & Dohme LLC
$349
Astellas Pharma US Inc
$338
Seagen Inc.
$334
TG THERAPEUTICS, INC.
$306
Rigel Pharmaceuticals, Inc.
$298
Incyte Corporation
$292
BeiGene USA, Inc.
$255
GENZYME CORPORATION
$238
GlaxoSmithKline, LLC.
$217
AbbVie Inc.
$216
Takeda Pharmaceuticals U.S.A., Inc.
$197
Pharmacyclics LLC, An AbbVie Company
$197
ABBVIE INC.
$184
EMD Serono, Inc.
$179
Boston Scientific Corporation
$173
Janssen Biotech, Inc.
$171
Daiichi Sankyo Inc.
$157
Eisai Inc.
$129
AbbVie, Inc.
$127
SERVIER PHARMACEUTICALS LLC
$120
Karyopharm Therapeutics Inc.
$117
Amneal Pharmaceuticals LLC
$105
Inari Medical, Inc.
$104
Mirati Therapeutics, Inc.
$83
Boehringer Ingelheim Pharmaceuticals, Inc.
$80
Pharmacyclics LLC, an AbbVie Company
$75
Deciphera Pharmaceuticals Inc.
$75
JAZZ PHARMACEUTICALS INC.
$72
G1 Therapeutics, Inc.
$61
Bayer HealthCare Pharmaceuticals Inc.
$58
SANOFI-AVENTIS U.S. LLC
$55
Octapharma USA, Inc.
$53
Menarini Silicon Biosystems, Inc.
$48
TAIHO ONCOLOGY, INC.
$42
Kyowa Kirin, Inc.
$42
MorphoSys, US Inc.
$41
ARRAY BIOPHARMA INC
$41
Pharmacosmos Therapeutics Inc.
$40
Regeneron Healthcare Solutions, Inc.
$34
ADC Therapeutics America, Inc.
$32
Biocon Biologics Inc
$32
Lilly USA, LLC
$31
Tempus AI, Inc
$30
Bayer Healthcare Pharmaceuticals Inc.
$30
AVEO Pharmaceuticals, Inc.
$29
AMAG Pharmaceuticals, Inc.
$29
Secura Bio, Inc.
$29
Intuitive Surgical, Inc.
$26
EISAI INC.
$25
SOBI, INC
$24
SpringWorks Therapeutics, Inc.
$23
Azurity Pharmaceuticals, Inc.
$23
CTI BioPharma Corp.
$23
Kite Pharma, Inc.
$22
PUMA BIOTECHNOLOGY, INC.
$21
Epizyme, Inc.
$20
Janssen Pharmaceuticals, Inc
$19
Foundation Medicine, Inc.
$19
Melinta Therapeutics, LLC
$19
Fennec Pharmaceuticals, Inc.
$18
Seattle Genetics, Inc.
$18
Apellis Pharmaceuticals, Inc.
$17
Taiho Oncology, Inc.
$17
Exelixis Inc.
$17
Innate Pharma, Inc
$16
NOVARTIS PHARMACEUTICALS CORPORATION
$14
Advanced Accelerator Applications
$14
Novo Nordisk Inc
$11
Fortovia Therapeutics, Inc.
$6
Iovance Biotherapeutics, Inc.
$6
Top 3 companies account for 28.3% of all-time payments
Associated products mentioned in payments ›
ABECMA · ADAKVEO · AFINITOR · ALIMTA · ALUNBRIG · ASPARLAS · AVASTIN · Abraxane · Alecensa · Aliqopa · Amtagvi · Avastin · BEVESPI AEROSPHERE · BOSULIF · BRAFTOVI · BRUKINSA · Bavencio · Blincyto · CABLIVI · CALQUENCE · CERDELGA · CHANTIX · COSELA · CT THROMBECTOMY SYSTEM KIT · Cabometyx · Cellsearch · Da Vinci Surgical System · Doptelet · ELIQUIS · ELREXFIO · ENHERTU · EPKINLY · ERBITUX · ERLEADA · Empaveli · Enhertu · FARYDAK · FERAHEME · FOTIVDA · FOUNDATIONONE · FRUZAQLA · Fabhalta · Fulphila · GAUCHER-DISEASE · GAZYVA · GILOTRIF · Hulio · IBRANCE · IMBRUVICA · IMFINZI · INJECTAFER · INLYTA · Imbruvica · JADENU · JAKAFI · JEMPERLI · KANJINTI · KEYTRUDA · KISQALI · KRAZATI · Kadcyla · Kyprolis · LENVIMA · LIBTAYO · LONSURF · LUMAKRAS · LUTATHERA · LYNPARZA · Lenvima · Lonsurf · Lumoxiti · Lunsumio · Lutathera · MEKINIST · MONJUVI · MONOFERRIC · MYLOTARG · NERLYNX · NINLARO · Neulasta · Novoeight · Nubeqa · OGSIVEO · OJJAARA · OPDIVO · OPDUALAG · PADCEV · PANZYGA · PIQRAY · PROMACTA · Padcev · Pedmark · Perjeta · Pomalyst · Poteligeo · QINLOCK · REBLOZYL · RYBREVANT · Revlimid · Rezzayo · SANCUSO · SANDOSTATIN · SANDOSTATIN LAR · SARCLISA · SCEMBLIX · SUTENT · Soltamox · SpyGlass · Stivarga · TAGRISSO · TALZENNA · TASIGNA · TECENTRIQ · TUKYSA · Tavalisse · Tazverik · Tibsovo · Trodelvy · UKONIQ · VENCLEXTA · VIVIMUSTA · VOTRIENT · VYXEOS · Venclexta · Vitrakvi · Vonjo · XALKORI · XARELTO · XOSPATA · XPOVIO · XTANDI · Xospata · Xtandi · Yescarta · ZALTRAP · ZEJULA · ZEPZELCA
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Hematology & oncology specialists in nearby ZIP areas
336
County median income
$81,797
Nearest hospital to ZIP centroid (approximate)
AMITA HEALTH RESURRECTION MEDICAL CENTER
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Witek is a mixed practice specialist, with above-average Medicare volume (top 20% in IL), with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Witek experienced with pembrolizumab injection (keytruda)?
Based on Medicare claims data, Dr. Witek performed 16,800 pembrolizumab injection (keytruda) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Witek receive payments from pharmaceutical companies?
Yes. Dr. Witek received a total of $13,656 from 79 companies across 620 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Witek's costs compare to other hematology & oncology specialists in Chicago?
Dr. Witek's average Medicare payment per service is $23. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Witek) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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