Medicare Enrolled

Dr. Gregory Gerstner, M.D.

Hematology & Oncology · Peoria, IL
Practice pattern: Mixed Practice — Diverse clinical practice across multiple procedure types
8940 N WOOD SAGE RD, Peoria, IL 61615
3092433000
Registered in NPPES since 2007
NPI: 1629288659 verify on NPPES ↗
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. Gerstner 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 →
Are you Dr. Gerstner? Request a correction or review of any data shown here. Provider portal →

What this data tells you about Dr. Gerstner

Dr. Gregory Gerstner is a hematology & oncology specialist in Peoria, IL, with 19 years of NPI registration. Based on federal Medicare data, Dr. Gerstner performed 222,767 Medicare services in 2023. These records do not provide a deduplicated patient total.

Between the years covered by Open Payments, Dr. Gerstner received a total of $3,166 from 48 pharmaceutical and/or device companies across 189 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. Gerstner 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.

✓ 19 years of NPI registration ▲ Top 2% volume in IL $3,166 industry payments

Medicare Practice Summary — 2023

Medicare Utilization ↗
222,767
Medicare services
Top 2% in IL for hematology & oncology
Not available
Unique patients (not deduplicated)
$9
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 (Feraheme)
An injection of ferumoxytol used to treat iron deficiency anemia in patients not on dialysis.
44,880 $0 $5
Iron infusion (Injectafer)
An intravenous injection of ferric carboxymaltose, an iron replacement medication.
24,750 $1 $4
Pembrolizumab injection (Keytruda) 18,600 $40 $147
Azacitidine chemotherapy injection
An injection of the medication azacitidine, measured at 1 mg per unit.
16,500 $0 $9
Darbepoetin injection (Aranesp) for anemia
An injection of darbepoetin alfa used for non-end-stage renal disease purposes.
15,630 $2 $12
Paclitaxel chemotherapy injection 14,649 $0 $2
Oxaliplatin chemotherapy injection
This procedure involves the administration of oxaliplatin, a chemotherapy medication, via injection. The dosage specified is 0.5 mg.
9,900 $0 $1
Anti-nausea injection (aprepitant) 9,750 $1 $6
Contrast dye for imaging (iodine-based)
A contrast agent containing 300-399 mg/ml of iodine used to enhance imaging studies. It is administered per milliliter to improve the visibility of internal structures.
7,565 $0 $2
Anti-nausea injection (fosaprepitant)
An injection of fosaprepitant, a medication used to prevent nausea and vomiting.
6,900 $0 $4
Denosumab injection (Prolia/Xgeva) 6,660 $18 $56
Bevacizumab-bvzr biosimilar injection, 10 mg
An injection of bevacizumab-bvzr, a biosimilar medication, administered in a 10 mg dose.
4,250 $25 $253
Iron sucrose injection (Venofer)
An injection of iron sucrose used to replenish iron levels in the body.
3,800 $0 $2
Dexamethasone injection (steroid)
An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram.
3,562 $0 $1
Pemetrexed injection, 10 mg
Administration of a 10 mg dose of pemetrexed medication via injection.
3,230 $15 $159
Injection, atezolizumab, 10 mg 3,120 $64 $208
Injection, docetaxel, 1 mg 2,946 $0 $7
Anti-nausea injection (Aloxi/palonosetron) 2,470 $1 $32
Immune globulin infusion (Octagam)
This procedure involves the administration of immune globulin medication directly into a vein. It is provided in a non-lyophilized liquid form.
2,310 $34 $107
Rituximab-pvvr biosimilar injection, 10 mg
An injection of rituximab-pvvr, a biosimilar medication, administered in a 10 mg dose.
1,880 $23 $230
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.
1,662 $8 $62
Comprehensive metabolic blood panel
A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers.
1,364 $10 $83
Blood draw (venipuncture)
Insertion of a needle into a vein to collect a blood sample.
1,307 $8 $26
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.
1,074 $92 $314
Magnesium sulfate injection, per 500 mg
An injection of magnesium sulfate administered in 500 mg increments.
918 $1 $2
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.
644 $21 $150
Carboplatin chemotherapy injection, 50 mg
Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection.
616 $2 $26
Intravenous chemotherapy infusion, 1 hour or less
Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete.
603 $94 $674
Immunoglobulin level test
A blood test that measures the level of gammaglobulins, which are immune system proteins.
579 $9 $103
Injection, leucovorin calcium, per 50 mg 559 $3 $13
Epoetin alfa injection (Retacrit) for anemia
An injection of a biosimilar form of epoetin alfa used for non-end-stage renal disease purposes. The dose administered is 1000 units.
540 $6 $45
Cyclophosphamide, 100 mg 522 $16 $120
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.
518 $6 $48
Intravenous injection of additional new drug or substance
Administration of an additional new medication or substance directly into a vein.
498 $11 $106
Etoposide chemotherapy injection
Administration of etoposide, a chemotherapy medication, via injection. The dose specified is 10 mg.
439 $1 $7
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.
424 $10 $122
Anti-nausea injection (ondansetron/Zofran) 420 $0 $1
Fluorouracil injection, 500 mg
Administration of a 500 mg dose of fluorouracil medication via injection.
401 $2 $10
Pegfilgrastim-apgf injection
An injection of pegfilgrastim-apgf, a biosimilar medication. The dose specified is 0.5 mg.
312 $94 $1,011
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.
304 $59 $223
Immunoglobulin light chain measurement
A blood test that measures the levels of immunoglobulin light chains, which are proteins produced by plasma cells.
258 $17 $70
Injection, potassium chloride, per 2 meq 255 $0 $1
Doxorubicin hydrochloride injection, 10 mg
This procedure involves the administration of a 10 mg dose of doxorubicin hydrochloride via injection.
248 $2 $8
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.
231 $47 $340
Diphenhydramine injection, up to 50 mg
An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams.
231 $1 $3
Pegfilgrastim injection, 0.5 mg
An injection of pegfilgrastim, a medication that stimulates the production of white blood cells. This specific code applies to the brand-name drug and excludes biosimilar versions.
228 $90 $781
Additional hour of intravenous infusion
This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis.
218 $15 $105
Intravenous infusion of new drug or substance, 1 hour or less
This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less.
214 $48 $327
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.
192 $19 $267
Zoledronic acid injection, 1 mg
An injection of zoledronic acid administered at a dose of 1 mg.
192 $7 $50
Cisplatin chemotherapy injection, 10 mg
Administration of a 10 mg dose of cisplatin, a chemotherapy medication, via injection.
190 $2 $16
Ferritin level test (iron stores)
A blood test that measures the level of ferritin, a protein that stores iron in the body.
178 $13 $107
Magnesium level test
A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess.
178 $7 $53
Iron level test 175 $6 $51
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.
173 $9 $69
Thyroid stimulating hormone (TSH) test
A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function.
172 $16 $132
Free thyroxine (T4) test
A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream.
161 $9 $71
Methylprednisolone injection, up to 125 mg
An injection of methylprednisolone sodium succinate, a corticosteroid medication, with a dosage of up to 125 mg.
161 $4 $21
Additional hour of intravenous chemotherapy
This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period.
139 $21 $147
Non-hormonal chemotherapy injection
This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue.
134 $53 $377
Intravenous drug injection
A procedure involving the administration of a medication or substance directly into a vein.
118 $27 $271
Vitamin B-12 injection
An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg.
110 $1 $8
Concurrent intravenous infusion
Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given.
107 $15 $101
Unclassified drug
A medication that does not fit into standard HCPCS or CPT classification categories.
101 $1 $5
Intravenous push injection of new drug or substance
A healthcare provider injects a new medication or substance directly into a vein using a push technique.
94 $40 $294
Leuprolide acetate (for depot suspension), 7.5 mg 94 $133 $591
Intravenous hydration infusion, 31-60 minutes
Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes.
84 $22 $272
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.
79 $123 $538
CT scan of chest with contrast
A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures.
75 $49 $2,273
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.
73 $2 $19
Serum protein measurement
A blood test that measures the total amount of protein in the serum. It helps evaluate overall health and nutritional status.
72 $11 $48
CT scan of abdomen and pelvis with contrast
A CT scan that uses dye to create detailed images of the abdomen and pelvis. This imaging test helps doctors examine internal organs and structures in these areas.
60 $157 $2,989
PSA test (prostate cancer screening) 55 $18 $145
Vitamin B-12 level test
A blood test that measures the amount of vitamin B-12 in your body.
54 $15 $119
Automated red blood cell count
An automated laboratory test that measures the number of red blood cells in a blood sample.
52 $4 $32
Irrigation of implanted venous access device
This procedure involves flushing an implanted venous access device to clear blockages or maintain patency. It ensures the device remains functional for delivering medications or fluids.
48 $16 $132
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.
47 $123 $444
IV chemotherapy initiation with community continuation
Initiation of an intravenous chemotherapy infusion in a clinic using clinic supplies, with continuation of the infusion in a community setting such as home or assisted living.
47 $195 $679
Vincristine sulfate chemotherapy injection
This code represents the administration of vincristine sulfate, a chemotherapy medication, measured at 1 mg.
45 $5 $25
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.
43 $9 $73
Nuclear medicine scan from skull base to mid-thigh with CT
A nuclear medicine imaging study covering the area from the base of the skull to the middle of the thighs, performed alongside a CT scan.
36 $1,071 $6,750
Subcutaneous or intramuscular chemotherapy injection
This procedure involves administering anti-cancer hormonal medication through an injection into the tissue under the skin or into a muscle.
34 $24 $155
Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries 30 $412 $926
Folic acid level test
A blood test that measures the amount of folic acid in the serum.
29 $14 $116
Serum immunofixation test
A laboratory test that analyzes a blood serum sample to identify specific abnormal proteins. The procedure uses an immunologic technique to detect and characterize these proteins.
29 $22 $90
Bone density scan (DEXA)
A test that uses low-dose X-rays to measure bone mineral density in the hip, pelvis, and spine. It helps assess bone strength and risk of fractures.
28 $26 $192
Telephone medical discussion, 5-10 minutes
A phone conversation with a physician lasting between 5 and 10 minutes to discuss medical matters.
22 $38 $136
Erythrocyte sedimentation rate (ESR) test
A blood test that measures how quickly red blood cells settle in a test tube to detect inflammation in the body. This specific method is performed manually rather than using an automated machine.
18 $4 $28
On-body injector for subcutaneous injection
A device is applied to the skin to automatically deliver a medication injection under the skin.
18 $13 $118
Initial hospital admission, moderate complexity
Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter.
17 $102 $458
New patient office visit (30-44 min)
An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range.
16 $87 $351
Normal saline infusion, 500 ml
Administration of sterile normal saline solution through an intravenous line. This procedure involves the infusion of a 500 ml unit of the solution.
14 $1 $18
Beta-2 microglobulin level test
A blood test that measures the level of beta-2 microglobulin, a protein produced by cells in the body.
12 $16 $127
New patient office visit, complex (60-74 min) 11 $171 $681
PSA test (prostate cancer screening)
A blood test that measures the level of prostate-specific antigen to screen for prostate cancer.
11 $19 $145
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.
33.3% high complexity
62.4% medium
4.3% routine

Industry Payment Transparency

Open Payments through 2023 ↗
$3,166
Total received (2018-2023)
Avg $528/year across 6 years
Top 50% in IL for hematology & oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
48
Companies
189
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.

2023
$161
2022
$747
2021
$136
2020
$214
2019
$1,034
2018
$873

Payments by company (2023)

Seagen Inc.
$39
Regeneron Healthcare Solutions, Inc.
$33
ABBVIE INC.
$27
Eisai Inc.
$17
Merck Sharp & Dohme LLC
$17
PFIZER INC.
$15
Novartis Pharmaceuticals Corporation
$14
Top 3 companies account for 61.0% of 2023 payments
All-time payments by company (2018-2023) ›
E.R. Squibb & Sons, L.L.C.
$369
Novartis Pharmaceuticals Corporation
$240
Seagen Inc.
$199
AstraZeneca Pharmaceuticals LP
$176
Merck Sharp & Dohme Corporation
$147
Janssen Biotech, Inc.
$139
Celgene Corporation
$120
Amgen Inc.
$116
GENZYME CORPORATION
$109
Astellas Pharma US Inc
$102
Takeda Pharmaceuticals U.S.A., Inc.
$95
Pharmacyclics LLC, An AbbVie Company
$90
PFIZER INC.
$81
Merck Sharp & Dohme LLC
$79
Genentech USA, Inc.
$77
Eisai Inc.
$76
Daiichi Sankyo Inc.
$68
Bayer HealthCare Pharmaceuticals Inc.
$65
EISAI INC.
$60
Lilly USA, LLC
$56
ABBVIE INC.
$53
Clovis Oncology, Inc.
$49
Tosoh Bioscience, Inc.
$48
Taiho Oncology, Inc.
$47
JAZZ PHARMACEUTICALS INC.
$39
Secura Bio, Inc.
$35
Alexion Pharmaceuticals, Inc.
$34
Regeneron Healthcare Solutions, Inc.
$33
EUSA Pharma (US) LLC
$32
Deciphera Pharmaceuticals Inc.
$30
Pharmacyclics LLC, an AbbVie Company
$28
Gilead Sciences, Inc.
$26
Jazz Pharmaceuticals Inc.
$24
GlaxoSmithKline, LLC.
$21
Advanced Accelerator Applications
$20
Janssen Pharmaceuticals, Inc
$19
Sysmex Inostics Inc
$17
CTI BioPharma Corp.
$16
EMD Serono, Inc.
$16
AMAG Pharmaceuticals, Inc.
$15
Ipsen Biopharmaceuticals, Inc
$15
Exelixis Inc.
$14
AbbVie, Inc.
$14
TerSera Therapeutics LLC
$13
G1 Therapeutics, Inc.
$12
Seattle Genetics, Inc.
$12
Incyte Corporation
$11
Verastem, Inc.
$11
Top 3 companies account for 25.5% of all-time payments
Associated products mentioned in payments ›
ADAKVEO · ADCETRIS · AFINITOR · ALIMTA · Abraxane · Alecensa · Aliqopa · CALQUENCE · COSELA · CYRAMZA · Cabometyx · Copiktra · DARZALEX · ELIQUIS · ELITEK · EMPLICITI · Erleada · FARYDAK · FASLODEX · FER · FERAHEME · GAZYVA · IMBRUVICA · IMFINZI · INJECTAFER · INLYTA · IRESSA · Idhifa · Imbruvica · JAKAFI · KANJINTI · KEYTRUDA · KISQALI · Kyprolis · LENVIMA · LIBTAYO · LONSURF · LYNPARZA · Lenvima · Lonsurf · Lutathera · MEKINIST · NINLARO · Neulasta · OPDIVO · PADCEV · PIQRAY · PLUVICTO · PROMACTA · Perjeta · Pomalyst · QINLOCK · REBLOZYL · Revlimid · Rubraca · SARCLISA · SOMATULINE DEPOT · ST AIA-PACK · SUTENT · Stivarga · Sylvant · TASIGNA · TIVDAK · TUKYSA · ULTOMIRIS · VENCLEXTA · VERZENIO · VYXEOS · Venclexta · Vonjo · XALKORI · XARELTO · XOSPATA · XTANDI · Xofigo · ZEJULA · ZEPZELCA · ZOLADEX
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 →
Looking for a hematology & oncology specialist in Peoria?
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Geographic Context

Hematology & oncology specialists in nearby ZIP areas
21
County median income
$64,938
Nearest hospital to ZIP centroid (approximate)
CARLE HEALTH PEKIN HOSPITAL
14.4 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 2023
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. Gerstner is a mixed practice specialist, with above-average Medicare volume (top 2% in IL), with 19 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. Gerstner experienced with iron infusion (feraheme)?
Based on Medicare claims data, Dr. Gerstner performed 44,880 iron infusion (feraheme) 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. Gerstner receive payments from pharmaceutical companies?
Yes. Dr. Gerstner received a total of $3,166 from 48 companies across 189 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. Gerstner's costs compare to other hematology & oncology specialists in Peoria?
Dr. Gerstner's average Medicare payment per service is $9. 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. Gerstner) 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 →
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.

Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Industry payment disclosure alone establishes neither wrongdoing nor legality. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →