Robert Bayer, M.D.
Hematology & Oncology Physician · Geneva, IL
Robert 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 on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Robert Bayer
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- Practice location
- 351 Delnor Dr, Geneva, IL 60134
- Phone
- (630) 232-0610
- Enumerated
- Jan 25, 2007
- Entity
- Type 1 · individual
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
- John Brayton, MDNeurological Surgery Physician1528179363
- Yoomi Brendel, APN, NP-CAdult Health Nurse Practitioner1508126897
- Chintan Desai, M.D.Internal Medicine Physician1326201898
- Sheri Dewan, MDNeurological Surgery Physician1497972640
- Jennifer Edens, NPAcute Care Nurse Practitioner1427065200
Verify Robert Bayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
54% 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 885 among the 8,428 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 Medicare quality score for 2023: 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, mostly food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 6,678 providers of this specialty with any payment received $7,643.36 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.
2 hospital and facility affiliations
- Central Dupage Physician GroupGeneva, IL
- Northwestern Medical Faculty FoundationDekalb, IL
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Hematology & Oncology Physician providers in Illinois
There are 508 hematology & oncology physician records in Illinois.
Other hematology & oncology physician records in Illinois
- Yasmin Abaza, M.D.Chicago, IL1033548383
- Worood Abboud, M.D.Joliet, IL1245325018
- Sabree Abedrabo, MDPark Ridge, IL1790344471
- Majed Abuhajir, MDRockford, IL1700837218
- Kehinde Adekola, MDChicago, IL1306026117
- Solomon Adler, M.D.Chicago, IL1043499866
- Edem Agamah, MDSpringfield, IL1932147279
- Mebea Aklilu, MDChicago, IL1376527739
- Omar Al TamimiSpringfield, IL1952083974
- Kathy Albain, M.D.Maywood, IL1679550842
Common questions
What is Robert Bayer, M.D.'s NPI number?
Robert 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 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 Bayer, M.D.'s license?
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 Bayer, M.D. prescribe under Medicare Part D?
In 2024, Robert Bayer, M.D. had 1,364 Medicare Part D claims for 268 beneficiaries; the average among hematology & oncology physician prescribers was 885. Part D covers Medicare prescriptions only.
What is Robert Bayer, M.D.'s Medicare quality 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.