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Dr. Gary R. Macvicar, MD

Hematology & Oncology (Hematology & Oncology Physician)

  • Medicare participating

At a glance

Years since graduation
27
In the NPI registry since
2006
Medicare patients seen, 2024
1,070

Licensed in Illinois since 2005, 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. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 1999Medical school: University of Chicago, Pritzker School of Medicine
  • 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

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 036114093 (first issued 2005; active)
  • Hematology (Internal Medicine) Physician
    IL license 036
  • Medical Oncology Physician
    IL license 036114093 (first issued 2005; 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
1,070
Services billed
225,991
Patients’ average age
75
Most frequent Medicare services, 2023
ServiceTimesPatients
Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use)35,19056
Injection, ferric carboxymaltose, 1 mg24,00026
Injection, azacitidine, 1 mg12,90017
Injection, pembrolizumab, 1 mg12,40020
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml9,936103
Injection, nivolumab, 1 mg9,64111
Injection, oxaliplatin, 0.5 mg8,80011
Injection, denosumab, 1 mg7,14037
Injection, aprepitant, 1 mg6,89025
Injection, paclitaxel, 1 mg5,01916

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

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Industry-funded research

Named as a principal investigator on 11 industry-funded studies in 2025, from 6 companies. The companies reported $1,014,238 in research payments for these studies, mostly to the institutions running them.

  • An Open-label, Randomized, Phase 3 Study of MK-6482 in Combination with Lenvatinib MK-7902 vs Cabozantinib for Treatment in Participants with Advanced Renal Cell Carcinoma Who Have Progressed After Prior Anti-PD-1,L1 …
    Merck Sharp & Dohme LLC
  • Randomized, Double-Blind, Multicenter Phase 3 Trial of BMS-986489 (BMS-986012 + nivolumab FDC) in combination with Carboplatin plus Etoposide vs Atezolizumab in combination with Carboplatin plus Etoposide as First-lin…
    E.r. Squibb & Sons, L.l.c.
  • A Phase 3, Multicenter, Randomized, Double-Blind Study of MK-7684 with Pembrolizumab as a Coformulation MK-7684A Versus Pembrolizumab Monotherapy as First Line Treatment for Participants With PD-L1 Positive Metastatic…
    Merck Sharp & Dohme LLC
  • A Phase 3 Randomized, Open-label Clinical Study to Evaluate the Pharmacokinetics and Safety of Subcutaneous Pembrolizumab Coformulated With Hyaluronidase MK 3475A Versus Intravenous Pembrolizumab, in the First-line Tr…
    Merck Sharp & Dohme LLC
  • A Phase 3, Randomized, Open-label Study of MK-5684 Versus Alternative Abiraterone Acetate or Enzalutamide in Participants with Metastatic Castration-resistant Prostate Cancer mCRPC That Progressed On or After Prior Tr…
    Merck Sharp & Dohme LLC
  • Study of Datopotamab Deruxtecan Plus Carboplatin or Cisplatin Versus Gemcitabine Plus Carboplatin or Cisplatin in Participants With Locally Advanced or Metastatic Urothelial Carcinoma
    Daiichi Sankyo Inc. · Recruiting · NCT07129993
  • Tiragolumab Tecentriq vs Durvalumab in Unresectable Stage III NSCLC
    Genentech, Inc.
  • Phase III Ipatasertib plus abiraterone in mCRPC 1st Line
    Genentech, Inc.
  • Atezolizumab Carboplatin Etoposide Tiragolumab or Placebo in 1L ES SCLC
    Genentech, Inc.
  • Study name not reported
    Organon Llc

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 Peoria

Sources

NPI registry (CMS NPPES, November 2026; record last updated March 2, 2026), 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 1487633251. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.