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Dr. Randy Sweis

Hematology & Oncology (Hematology & Oncology Physician)

5841 S Maryland Ave
Chicago, IL 60637

Who else practices at this address →

Cook County includes primary care (3% of residents) and mental health (4% of residents) shortage areas. About shortage areas

Call (888) 824-0200

  • Medicare participating

At a glance

Years since graduation
16
In the NPI registry since
2010
Medicare patients seen, 2024
101

Licensed in Illinois since 2013, according to the Illinois Department of Financial and Professional Regulation. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.

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. What an NPI is

Education and training

  • 2010Medical school: University of Chicago, Pritzker School of Medicine
  • 2010Registered with an NPI (national billing number; not a license date)

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

  • Hematology & Oncology Physician primary
    IL license 036132765 (first issued 2013; active)

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Hematology & Oncology per capita by county →

Where they work

Hospitals

Medical groups

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
101
Services billed
329
Patients’ average age
75
Most frequent Medicare services, 2023
ServiceTimesPatients
Established patient office or other outpatient visit, 40-54 minutes13359
Established patient office or other outpatient visit, 30-39 minutes7251
New patient office or other outpatient visit, 60-74 minutes1616

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

Most prescribed drugs, Medicare Part D 2024
DrugPrescriptions
Prednisone
Other prescribers in Chicago, IL
78
Abiraterone Acetate64
Cabometyx (cabozantinib s-malate)39
Lenvima (lenvatinib mesylate)18
Orgovyx (relugolix)17
Prochlorperazine Maleate
Other prescribers in Chicago, IL
15

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, 4 companies reported 5 payments worth $5,037 in total to this clinician.

By company
Eisai Inc.$2,564
Eisai Co., LTD.$2,355
Eli Lilly and Company$60.00
Merck Sharp & Dohme LLC$58.10
By type
Consulting Fee$4,710
Food and Beverage$327

What the payments were for

Largest payments other than meals
DateCompanyWhat it was forAmount
Mar 14, 2025Eisai Co., LTD.
Mar 14, 2025
Consulting Fee
Lenvima · Oncology
$2,355
May 5, 2025Eisai Inc.
May 5, 2025
Consulting Fee
Lenvima · Oncology
$2,355

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.

Who received the most in Illinois →

Industry-funded research

Named as a principal investigator on 10 industry-funded studies in 2025, from 7 companies. The companies reported $1,216,316 in research payments for these studies, mostly to the institutions running them.

From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.

Other Hematology & Oncology clinicians in Chicago

Sources

NPI registry (CMS NPPES, November 2026; record last updated October 24, 2022), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1093034498. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.