Medicare Enrolled
Dr. Gary Kay, M.D.
Hematology & Oncology · Elk Grove Village, IL
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Kay from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Kay
Dr. Gary Kay is a hematology & oncology specialist in Elk Grove Village, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Kay performed 29,968 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Kay received a total of $399,955 from 80 pharmaceutical and/or device companies across 852 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Kay is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years of NPI registration
▲ Top 27% volume in IL
$399,955 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗29,968
Medicare services
Top 27% in IL for hematology & oncology
Not available
Unique patients (not deduplicated)
$5
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Iron infusion (Injectafer) An intravenous injection of ferric carboxymaltose, an iron replacement medication. |
15,750 | $1 | $2 |
| Darbepoetin injection (Aranesp) for anemia An injection of darbepoetin alfa used for non-end-stage renal disease purposes. |
7,080 | $2 | $9 |
| Injection, granisetron, extended-release, 0.1 mg | 3,400 | $6 | $10 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
772 | $0 | $2 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
702 | $7 | $55 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
416 | $10 | $65 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
327 | $94 | $290 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
201 | $12 | $68 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
194 | $66 | $190 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
144 | $137 | $335 |
| Immunoglobulin level test A blood test that measures the level of gammaglobulins, which are immune system proteins. |
141 | $9 | $40 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
112 | $13 | $74 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
88 | $107 | $488 |
| Additional sequential IV infusion, 1 hour or less This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less. |
86 | $23 | $135 |
| Lactate dehydrogenase (LDH) level test A blood test that measures the amount of lactate dehydrogenase, an enzyme found in many body tissues. It helps assess tissue damage or disease. |
77 | $6 | $48 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
57 | $53 | $230 |
| Iron level test | 52 | $6 | $50 |
| Iron binding capacity test A blood test that measures the amount of iron in the blood and the blood's ability to bind and transport iron. |
52 | $9 | $35 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
52 | $12 | $85 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
48 | $66 | $165 |
| Carcinoembryonic antigen (CEA) level test A blood test that measures the level of carcinoembryonic antigen (CEA) protein. This test is used to monitor certain types of cancer. |
39 | $19 | $100 |
| Phosphate level test A blood test that measures the amount of phosphate in your body. Phosphate is a mineral that helps keep bones and teeth strong. |
35 | $5 | $30 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
31 | $16 | $93 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
28 | $145 | $429 |
| Additional hour of intravenous hydration This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy. |
26 | $11 | $65 |
| Normal saline infusion, 1000 cc Administration of 1000 cc of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater solution. |
17 | $2 | $19 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
15 | $15 | $80 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
14 | $122 | $390 |
| New patient office visit, complex (60-74 min) | 12 | $169 | $495 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
53.4% high complexity
38.4% medium
8.2% routine
Industry Payment Transparency
Open Payments through 2024 ↗$399,955
Total received (2018-2024)
Avg $57,136/year across 7 years
Top 2% in IL for hematology & oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
80
Companies
852
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$15,383
2023
$43,432
2022
$31,509
2021
$51,851
2020
$41,085
2019
$128,785
2018
$87,911
Payments by company (2024)
PFIZER INC.
$9,743
Janssen Biotech, Inc.
$1,721
PharmaEssentia USA Corporation
$1,540
ASD Specialty Healthcare, LLC
$453
Pharmacosmos Therapeutics Inc.
$228
Novartis Pharmaceuticals Corporation
$197
Heron Therapeutics, Inc.
$165
PUMA BIOTECHNOLOGY, INC.
$164
E.R. Squibb & Sons, L.L.C.
$158
Genentech USA, Inc.
$121
ABBVIE INC.
$105
Astellas Pharma US Inc
$87
Celgene Corporation
$70
EAGLE PHARMACEUTICALS, INC.
$66
Takeda Pharmaceuticals U.S.A., Inc.
$55
AstraZeneca Pharmaceuticals LP
$51
GlaxoSmithKline, LLC.
$45
Lilly USA, LLC
$45
Mirati Therapeutics, Inc.
$40
Merck Sharp & Dohme LLC
$39
JAZZ PHARMACEUTICALS INC.
$34
Incyte Corporation
$31
Tempus AI, Inc
$30
Regeneron Healthcare Solutions, Inc.
$29
Stemline Therapeutics Inc.
$28
Deciphera Pharmaceuticals Inc.
$28
Blueprint Medicines Corporation
$25
EMD Serono, Inc.
$25
ARRAY BIOPHARMA INC
$24
Gilead Sciences, Inc.
$21
SERVIER PHARMACEUTICALS LLC
$14
Top 3 companies account for 84.5% of 2024 payments
All-time payments by company (2018-2024) ›
Lilly USA, LLC
$134,814
Amgen Inc.
$50,546
Gilead Sciences, Inc.
$44,771
Seagen Inc.
$38,069
Heron Therapeutics, Inc.
$35,432
Kite Pharma, Inc.
$23,003
Coherus Biosciences Inc.
$15,238
Novartis Pharmaceuticals Corporation
$14,360
PFIZER INC.
$10,007
Dova Pharmaceuticals
$8,493
E.R. Squibb & Sons, L.L.C.
$2,103
Janssen Biotech, Inc.
$2,018
AstraZeneca Pharmaceuticals LP
$1,993
GlaxoSmithKline, LLC.
$1,900
PharmaEssentia USA Corporation
$1,616
Regeneron Healthcare Solutions, Inc.
$1,582
Jazz Pharmaceuticals Inc.
$1,500
Immunomedics, Inc.
$1,400
Athenex Pharmaceutical Division, LLC
$1,250
Sobi, Inc
$1,150
Taiho Oncology, Inc.
$1,088
ASD Specialty Healthcare, LLC
$999
Genentech USA, Inc.
$959
BeiGene USA, Inc.
$629
MorphoSys, US Inc.
$533
ASD SPECIALTY HEALTHCARE, LLC
$351
Merck Sharp & Dohme Corporation
$310
Celgene Corporation
$306
PUMA BIOTECHNOLOGY, INC.
$284
G1 Therapeutics, Inc.
$267
Pharmacosmos Therapeutics Inc.
$228
Merck Sharp & Dohme LLC
$199
Incyte Corporation
$164
GENZYME CORPORATION
$162
Takeda Pharmaceuticals U.S.A., Inc.
$160
Astellas Pharma US Inc
$155
ABBVIE INC.
$145
Seattle Genetics, Inc.
$131
Daiichi Sankyo Inc.
$124
JAZZ PHARMACEUTICALS INC.
$107
Karyopharm Therapeutics Inc.
$100
Mirati Therapeutics, Inc.
$88
Janssen Pharmaceuticals, Inc
$77
Deciphera Pharmaceuticals Inc.
$75
Elekta, Inc.
$70
Lexicon Pharmaceuticals, Inc.
$67
EAGLE PHARMACEUTICALS, INC.
$66
EMD Serono, Inc.
$62
TESARO, Inc.
$58
Stemline Therapeutics Inc.
$48
Exelixis Inc.
$44
ADC Therapeutics America, Inc.
$42
Eisai Inc.
$41
Boehringer Ingelheim Pharmaceuticals, Inc.
$40
ARRAY BIOPHARMA INC
$38
Bayer HealthCare Pharmaceuticals Inc.
$36
Pharmacyclics LLC, An AbbVie Company
$35
Dendreon Pharmaceuticals LLC
$33
Tempus AI, Inc
$30
Blueprint Medicines Corporation
$25
Acrotech Biopharma LLC
$24
EISAI INC.
$22
Puma Biotechnology, Inc.
$21
Clovis Oncology, Inc.
$20
Agios Pharmaceuticals, Inc.
$20
AVEO Pharmaceuticals, Inc.
$19
Sun Pharmaceutical Industries Inc.
$18
AbbVie Inc.
$18
CTI BioPharma Corp.
$17
Bayer Healthcare Pharmaceuticals Inc.
$16
Adaptive Biotechnologies Corporation
$16
Foundation Medicine, Inc.
$16
Kyowa Kirin, Inc.
$15
SERVIER PHARMACEUTICALS LLC
$14
Tactile Systems Technology Inc
$14
Ipsen Biopharmaceuticals, Inc
$14
Advanced Accelerator Applications
$13
Aurobindo Pharma USA, Inc.
$13
MACROGENICS, INC.
$12
Verastem, Inc.
$12
Top 3 companies account for 57.5% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · ALIMTA · ALUNBRIG · AYVAKIT · Abraxane · Alecensa · Avastin · BAVENCIO · BELEODAQ · BESREMI · BOSULIF · BRAFTOVI · BRUKINSA · Bavencio · Blincyto · CABLIVI · CABOMETYX · CALQUENCE · CARVYKTI · CHANTIX · CINVANTI · COSELA · CYRAMZA · Cabometyx · Columvi · Copiktra · DARZALEX · DOPTELET · Doptelet · ELIQUIS · EMEND · ENHERTU · EPKINLY · ERLEADA · Enhertu · FLEXITOUCH · FOTIVDA · FOUNDATIONONE · FRUZAQLA · Fabhalta · GAZYVA · GILOTRIF · IBRANCE · IMBRUVICA · IMFINZI · INJECTAFER · INLYTA · Imbruvica · JAKAFI · JAYPIRCA · JEMPERLI · JEVTANA · KEYTRUDA · KISQALI · KRAZATI · Kadcyla · Kyprolis · LIBTAYO · LUMAKRAS · LUTATHERA · LYNPARZA · Lenvima · Lonsurf · Lunsumio · Lutathera · MARGENZA · MEKINIST · MONJUVI · MYLOTARG · NERLYNX · NINLARO · Nplate · OPDIVO · OPDUALAG · Oral Paclitaxel · Orserdu · PADCEV · PEMAZYRE · PEMFEXY · PIQRAY · PLUVICTO · PROMACTA · PROVENGE · PYRUKYND · Padcev · Perjeta · Pomalyst · Poteligeo · Prolia · QINLOCK · REBLOZYL · RYBREVANT · Revlimid · Rubraca · SARCLISA · SCEMBLIX · SOMATULINE DEPOT · SUSTOL · SUTENT · Stivarga · TAGRISSO · TASIGNA · TECENTRIQ · TECVAYLI · TRODELVY · TUKYSA · Tecentriq · Trodelvy · Udenyca · VENCLEXTA · VERZENIO · VOTRIENT · VYXEOS · Vectibix · Venclexta · Versa HD · Vonjo · WAINUA · XALKORI · XARELTO · XGEVA · XPOVIO · XTANDI · Xermelo · Xofigo · Xospata · Xtandi · YONSA · Yescarta · ZEJULA · ZEPZELCA · ZYTIGA · Zevalin · Zydelig · clonoSEQ
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Hematology & oncology specialists in nearby ZIP areas
288
County median income
$81,797
Nearest hospital to ZIP centroid (approximate)
ALEXIAN BROTHERS MEDICAL CENTER 1
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Kay is a mixed practice specialist, with above-average Medicare volume (top 27% in IL), with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Kay experienced with iron infusion (injectafer)?
Based on Medicare claims data, Dr. Kay performed 15,750 iron infusion (injectafer) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Kay receive payments from pharmaceutical companies?
Yes. Dr. Kay received a total of $399,955 from 80 companies across 852 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Kay's costs compare to other hematology & oncology specialists in Elk Grove Village?
Dr. Kay's average Medicare payment per service is $5. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Kay) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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