Robert A. Bayer, M.D.
Hematology & Oncology Physician · Geneva, IL
Robert A. Bayer, M.D. is a hematology & oncology physician with a practice address in Geneva, Illinois, and NPI 1669527818, issued on Jan 25, 2007. Check the license (Illinois 036073155, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Robert A. Bayer
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 036073155 IL
Self-reported in NPPES; status is on the state search - Practice location
- 351 Delnor Dr, Geneva, IL 60134
- Phone
- (630) 232-0610
- Enumerated
- Jan 25, 2007
- Record last updated
- Apr 1, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (630) 232-0675
- Medicaid ID
- 036073155 IL
- Medicare enrollment
- Enrolled (PECOS I20060508000919); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
Also registered at 351 Delnor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jean Born, PA-CPhysician Assistant1821229501
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- Yoomi Brendel, APN, NP-CNurse Practitioner1508126897
- Chintan Desai, M.D.Cardiovascular Disease Physician1326201898
- Sheri Dewan, MDNeurological Surgery Physician1497972640
- Jennifer Edens, NPNurse Practitioner1427065200
Verify Robert A. Bayer 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 036073155Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,364 Medicare Part D claims for 268 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims. 19 claims were for opioids.
Most prescribed
- Acyclovir126 claims
- Prednisone98 claims
- Eliquis74 claims
- Hydroxyurea69 claims
- Xarelto67 claims
- Revlimid61 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.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $34.12
1 payment: food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. 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.
Bills Medicare through 2 group practices
- Central Dupage Physician GroupGeneva, IL
- Northwestern Medical Faculty FoundationDekalb, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert A. Bayer among 666 hematology & oncology physician records in Illinois
Robert A. Bayer, M.D. 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 2007, is newer than 43% of them.
- NPI issued2007 · 43% of these records are older, 48% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1984 · median 2003 among the 461 with a school on file
- Record last updated2013 · 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 Geneva → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Arlene D'Souza, M.D.Geneva, IL 601341881828275
- Christopher George, M.D.Geneva, IL 601341235143835
- Perry Menini, D.O.Geneva, IL 601341558568410
- Rodney Nelson, M.D.Geneva, IL 601341831183342
- Avanthi Ragam, M.D.Geneva, IL 601341932355013
- Habib Shaikh, D.O,Geneva, IL 601341861658288
- Nirmala Bhoopalam, M.D.Hines, IL 601411184633174
- Abdul Choudhury, M.D.Hines, IL 601411376626358
Common questions
What is Robert A. Bayer, M.D.'s NPI number?
Robert A. Bayer, M.D.'s National Provider Identifier (NPI) is 1669527818, issued on Jan 25, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Robert A. Bayer, M.D. located?
The NPPES record lists a practice address at 351 Delnor Dr, Geneva, IL, 60134. Phone: (630) 232-0610. Providers update this record themselves, so call before visiting.
How can I verify Robert A. Bayer, M.D.'s license?
NPPES lists Illinois license number 036073155, 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 Robert A. Bayer, M.D. prescribe under Medicare Part D?
In 2024, Robert A. Bayer, M.D. had 1,364 Medicare Part D claims for 268 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Robert A. Bayer, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.