Brenda Grzenia
Hematology & Oncology Physician · Orland Park, IL
Brenda Grzenia is a hematology & oncology physician with a practice address in Orland Park, Illinois, and NPI 1376317388, issued on Nov 9, 2023. Check the license (Illinois 209028719, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Brenda Grzenia
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 209028719 IL
Self-reported in NPPES; status is on the state search - Practice location
- 17047 LA Grange RD, Orland Park, IL 60487
- Phone
- (815) 300-7764
- Enumerated
- Nov 9, 2023
- Record last updated
- Aug 27, 2024
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
Also registered at 17047 LA Grange RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Abraham, PA-CPhysician Assistant1528627239
- Lisa Abu-Samra, CNMAdvanced Practice Midwife1215479621
- Zahid Afzal, MDGastroenterology Physician1528044518
- Arnold Bolisay, MDEndocrinology, Diabetes & Metabolism Physician1891758512
- Saoud Loutfi, MDHematology & Oncology Physician1598750101
- Robert Markus, MDOrthopaedic Surgery Physician1588629026
Verify Brenda Grzenia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 209028719Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
289 Medicare Part D claims for 68 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 30 claims were for opioids.
Most prescribed
- Prednisone18 claims
- Eliquis16 claims
- Nystatin16 claims
- Dexamethasone13 claims
- Gabapentin13 claims
- Xarelto13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,052.74
44 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Brenda Grzenia among 666 hematology & oncology physician records in Illinois
Brenda Grzenia is one of 666 hematology & oncology physician records with a practice address in Illinois. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 98% of them.
- NPI issued2023 · 98% of these records are older, under 1% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Illinois
There are 666 hematology & oncology physician records in Illinois.
All 666 in Illinois → Every provider in Orland Park → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Vasia Ahmed, M.D.Tinley Park, IL 604871992797047
- Mufaddal Hamadeh, M.D.Tinley Park, IL 604871598757718
- Shadi Latta, MDTinley Park, IL 604871427255447
- Saoud Loutfi, MDOrland Park, IL 604871598750101
- Jose Paredes, M.D.Tinley Park, IL 604871609868819
- Subramanya Rao, M.D.Tinley Park, IL 604871740256783
- Wasif Shirazi, M.D.Tinley Park, IL 604871558336149
- Joseph Meschi, M.D.Aurora, IL 605041942295530
Common questions
What is Brenda Grzenia's NPI number?
Brenda Grzenia's National Provider Identifier (NPI) is 1376317388, issued on Nov 9, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Brenda Grzenia located?
The NPPES record lists a practice address at 17047 LA Grange RD, Orland Park, IL, 60487. Phone: (815) 300-7764. Providers update this record themselves, so call before visiting.
How can I verify Brenda Grzenia's license?
NPPES lists Illinois license number 209028719, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Brenda Grzenia prescribe under Medicare Part D?
In 2024, Brenda Grzenia had 289 Medicare Part D claims for 68 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.