Gary E. Kay, M.D.
Hematology & Oncology Physician · Elk Grove Village, IL
Gary E. Kay, M.D. is a hematology & oncology physician with a practice address in Elk Grove Village, Illinois, and NPI 1205897923, issued on Mar 31, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gary E. Kay
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- Practice location
- 800 Biesterfield RD, Elk Grove Village, IL 60007
- Phone
- (847) 437-3312
- Enumerated
- Mar 31, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050113000381); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
Also registered at 800 Biesterfield RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Abbinanti, PA-CPhysician Assistant1679647358
- Dennis Abella, DOInternal Medicine Physician1962498451
- Vanita Achar, MS,RD,LDN,CDE,CNSDRegistered Dietitian1104033810
- Gregory Adamo, M.D.Diagnostic Radiology Physician1790712347
- Maria Agopian, NPAcute Care Nurse Practitioner1235407735
- Bruce Bank, M.D.Hematology & Oncology Physician1225099823
Verify Gary E. Kay 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
35% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
569 Medicare Part D claims for 92 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
Most prescribed
- Letrozole91 claims
- Eliquis53 claims
- Gabapentin35 claims
- Dexamethasone29 claims
- Warfarin Sodium28 claims
- Anastrozole27 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: $15,383.27
75 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. 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 one group practice
- Northwest Oncology And Hematology SCRolling Meadows, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary E. Kay among 666 hematology & oncology physician records in Illinois
Gary E. Kay, 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 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 57% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1983 · median 2003 among the 461 with a school on file
- Record last updated2007 · 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).
12 hematology & oncology physician records list a practice address in Elk Grove Village
They are 12 of the 972 NPPES records with a practice address in Elk Grove Village, and 666 hematology & oncology physician records in Illinois.
All 666 in Illinois → Every provider in Elk Grove Village → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Bruce Bank, M.D.Elk Grove Village, IL 600071225099823
- Gary Gordon, M.D.Elk Grove Village, IL 600071245291780
- Gary Grad, M.D.Elk Grove Village, IL 600071629039227
- Steven Kanter, M.D.Elk Grove Village, IL 600071730140922
- Suzanne Lafollette, M.D.Elk Grove Village, IL 600071417918681
- Edwin Priest, M.D.Elk Grove Village, IL 600071588625875
- Herbert Reisel, M.D.Elk Grove Village, IL 600071497716807
- Ronald Shade, M.D.Elk Grove Village, IL 600071720049984
Common questions
What is Gary E. Kay, M.D.'s NPI number?
Gary E. Kay, M.D.'s National Provider Identifier (NPI) is 1205897923, issued on Mar 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary E. Kay, M.D. located?
The NPPES record lists a practice address at 800 Biesterfield RD, Elk Grove Village, IL, 60007. Phone: (847) 437-3312. Providers update this record themselves, so call before visiting.
How can I verify Gary E. Kay, 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 Gary E. Kay, M.D. prescribe under Medicare Part D?
In 2024, Gary E. Kay, M.D. had 569 Medicare Part D claims for 92 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.