Dr. Bozena Witek, MD
- Medicare services, 2024
- 46,357
- Medicare patients, 2024
- 441
- Part D claims, 2024
- 1,627
- Hospital affiliations
- 4
- Industry payments
- $19,390
- Practice address
- 7447 W Talcott Ave, Chicago, IL 60631
- Practice phone
- Call (773) 631-2728
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Gastroenterology Solutions, S.C.
Chicago, Illinois
Find Dr. Witek's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Bozena Witek is a hematologist and oncologist in Chicago, Illinois
Dr. Witek practices at Gastroenterology Solutions, S.C. in Chicago, Illinois.
Dr. Witek's NPI, 1275639585, was assigned on September 15, 2006. Dr. Witek holds Illinois license 036076914.
- NPI
- 1275639585NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5395643076
- NPI enumeration date
- September 15, 2006
- NPI status
- Active
- Practice phone
- (773) 631-2728
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Bozena Witek practices at Gastroenterology Solutions, S.C. in Chicago, Illinois
Dr. Witek's primary practice is Gastroenterology Solutions, S.C., at 7447 W Talcott Ave, Chicago, IL 60631 in Cook County. The practice phone is (773) 631-2728.
- Gastroenterology Solutions, S.C.7447 W Talcott Ave, Chicago, IL 60631 · Cook CountyPhone(773) 631-2728
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Bozena Witek is affiliated with 6 sites of care and 1 medical group
Dr. Witek's primary practice is Gastroenterology Solutions, S.C. in Chicago, Illinois. Dr. Witek is also affiliated with Resurrection Medical Center. The medical group on file is Illinois Cancer Specialists. Dmand AI also links Dr. Witek to 3 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Bozena Witek's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Witek practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Gastroenterology Solutions, S.C. | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Bozena Witek is one of 563 hematologists and oncologists in Illinois
Hematology and oncology is Dr. Witek's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Witek is licensed in Illinois.
Specialties and state licenses
- Hematology and oncology, IllinoisPrimary
Hematologists and oncologists near Dr. Witek
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Bozena Witek billed Medicare for 46,357 services in 2024
CMS data shows 46,357 Medicare services from Dr. Witek across 31 procedure codes in 2024, for 441 Medicare patients. Medicare paid $253,197 for them.
Dr. Witek's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 9262024: 25,6592671%
- Drugs given in the office
- 2023: 44,9902024: 18,20760%
- Tests and treatments
- 2023: 1,7262024: 1,26627%
- Office and hospital visits
- 2023: 1,4332024: 1,21115%
- Surgery
- 2023: 02024: 14
Where Dr. Witek's Medicare services took place, 2024
- In an office46,12299%
- In a facility2351%
Dr. Witek compared with the Illinois median for hematologists and oncologists, 2024
- Dr. Witek
- Illinois median
- Medicare services
- 46,357vs 1,05643.9 times
- Medicare patients
- 441vs 28256% above
- Part D claims
- 1,390vs 3284.2 times
Medians across 547 hematologists and oncologists in Illinois with Dmand AI profiles that report each measure.
Dr. Witek's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Bozena Witek treated 441 Medicare patients in 2024, average age 77
CMS counts 441 Medicare patients who saw Dr. Witek in 2024. The largest group is 75 to 84, with 186 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 2.12, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Witek's median patient age at 73, with 61% women.
Dr. Witek's Medicare patients by age, 2024
Dr. Witek's Medicare patients by sex, 2024
- Women27462%
- Men16738%
Chronic conditions among Dr. Witek's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Cancer45%
- Heart failure41%
- Diabetes39%
- Ischemic heart disease39%
- Chronic kidney disease32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Witek's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women61%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Bozena Witek wrote 1,627 Medicare Part D claims in 2024
In 2024, Dr. Witek wrote 1,627 Medicare Part D claims for 218 patients. 78% of them were for generic drugs. CMS names the drug for 1,390 of them, across 35 drugs with 11 or more claims each, at $3,786,831 in total drug cost. In 2023, CMS named 1,300 claims across 35 drugs.
Dr. Witek's Part D claims by kind of drug, 2024
- Generic1,269 claims78%
- Brand-name358 claims22%
Dr. Witek's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Witek's Part D claims, 2024
- Opioids4%64 of 1,627 claims
- Antibiotics3%47 of 1,627 claims
- Antipsychotics, patients 65 and over1%12 of 1,627 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,3002024: 1,3907%
Drugs named by CMS: 35 in 2024, 35 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Bozena Witek received $19,390 in industry payments from 2016 to 2025
CMS Open Payments shows 912 general payments to Dr. Witek from 84 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Novartis Pharmaceuticals Corporation paid the most, $2,866.
General payments to Dr. Witek by program year, 2016 to 2025
General payments to Dr. Witek by kind, 2016 to 2025
- Food and beverage$18,67796%
- Education$7134%
Companies that paid Dr. Witek the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Bozena Witek's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Bozena Witek
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Bozena Witek's NPI number?
Dr. Bozena Witek's NPI number is 1275639585. It was assigned on September 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Bozena Witek?
Dr. Bozena Witek is a hematologist and oncologist in Chicago, Illinois. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Bozena Witek practice?
Dr. Witek practices at 7447 W Talcott Ave, Chicago, IL 60631. Dr. Witek's primary practice is Gastroenterology Solutions, S.C. in Chicago, Illinois. Dmand AI also links Dr. Witek to 3 hospitals and 1 group practice or clinic.
What is Dr. Bozena Witek's office phone number?
The practice phone on file for Dr. Witek is (773) 631-2728.
What is Dr. Bozena Witek's medical license number?
Dr. Witek holds Illinois license 036076914.
Which hospitals is Dr. Bozena Witek affiliated with?
Dr. Witek is affiliated with Resurrection Medical Center. Dmand AI links Dr. Witek to 3 more hospitals.
What medical group is Dr. Bozena Witek part of?
Dr. Witek is linked to Illinois Cancer Specialists.
Does Dr. Bozena Witek accept Medicare?
Yes. CMS data shows Dr. Witek billed Medicare for 46,357 services in 2024.
How many Medicare patients does Dr. Bozena Witek see?
CMS counts 441 Medicare patients who saw Dr. Witek in 2024, with an average age of 77.
What services does Dr. Bozena Witek bill to Medicare?
In 2024, Dr. Witek's most billed Medicare services were medicare temporary code (Q5110), injected or infused drug (J1453) and injected or infused drug (J0897).
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What drugs does Dr. Bozena Witek prescribe most?
In 2024 Medicare Part D data, Dr. Witek's most prescribed drugs by claims were Letrozole, Gabapentin and Eliquis.
Has Dr. Bozena Witek received payments from drug or device companies?
CMS Open Payments shows $19,390 in general payments to Dr. Witek from 84 companies from 2016 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Bozena Witek been practicing?
Dr. Witek graduated from medical school in 1983, 43 years ago.
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