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Dr. Brian P. Freeman, M.D.

Medical Oncology (Medical Oncology Physician)

  • Medicare participating

At a glance

Years since graduation
21
In the NPI registry since
2006
Medicare patients seen, 2024
908

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

  • 2005Medical school: University of Iowa, Rj & L Carver College 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

  • Medical Oncology Physician primary
    IA license MD-36821
  • Hematology & Oncology Physician
    IA license 36821
  • Internal Medicine Physician
    IA license 36821

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

Map: Medical 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
908
Services billed
197,715
Patients’ average age
75
Most frequent Medicare services, 2023
ServiceTimesPatients
Injection, darbepoetin alfa, 1 microgram (non-esrd use)20,50018
Injection, pembrolizumab, 1 mg18,60034
Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use)15,81022
Injection, paclitaxel protein-bound particles, 1 mg11,20013
Injection, iron sucrose, 1 mg9,60033
Injection, daratumumab, 10 mg and hyaluronidase-fihj7,74012
Injection, paclitaxel, 1 mg5,78216
Injection, denosumab, 1 mg4,92038
Injection, aprepitant, 1 mg4,16023
Injection, dexamethasone sodium phosphate, 1 mg3,37098

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 3 industry-funded studies in 2025, from 1 companies. The companies reported $63,551 in research payments for these studies, mostly to the institutions running them.

  • A Phase III, Randomised, Open-label, Multicentre, Global Study of Datopotamab Deruxtecan (Dato-DXd) in Combination with Durvalumab and Carboplatin Versus Pembrolizumab in Combination with Platinum-based Chemotherapy f…
    AstraZeneca Pharmaceuticals LP
  • A Phase III, Randomized, Double-blind, Multicenter, Global Study of Rilvegostomig or Pembrolizumab Monotherapy for the First-line Treatment of Patients with PD-L1-high Metastatic Non-small Cell Lung Cancer ARTEMIDE-Lu…
    AstraZeneca Pharmaceuticals LP
  • A phase III,two arm,parallel,randomized,multi center,open label,global study to determine the efficacy of volrustomig,plus chemotherapy versus pembrolizumab plus chemotherapy for first line treatment of patients with …
    AstraZeneca Pharmaceuticals LP

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 Medical Oncology clinicians in Des Moines

Sources

NPI registry (CMS NPPES, November 2026; record last updated November 18, 2025), 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 1225141609. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.