Medicare Enrolled
Dr. Gregory Guzley, MD
Hematology & Oncology · San Antonio, TX
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
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. Guzley 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. Guzley
Dr. Gregory Guzley is a hematology & oncology specialist in San Antonio, TX, with 20 years of NPI registration. Based on federal Medicare data, Dr. Guzley performed 53,463 Medicare services across 1,789 unique beneficiaries.
Between the years covered by Open Payments, Dr. Guzley received a total of $14,482 from 66 pharmaceutical and/or device companies across 1003 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in hematology & oncology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Guzley is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years in practice
▲ Top 17% volume in TX
$14,482 industry payments
Medicare Practice Summary
Medicare Utilization ↗53,463
Medicare services
Top 17% in TX for hematology & oncology
1,789
Unique beneficiaries
$4
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~2,673 Medicare services per year of practice
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) | 23,970 | $0 | $5 |
| Darbepoetin injection (Aranesp) for anemia | 15,030 | $2 | $20 |
| Contrast dye for imaging (iodine-based) | 6,372 | $0 | $3 |
| Immune globulin infusion (Octagam) | 1,580 | $33 | $233 |
| Blood draw (venipuncture) | 762 | $8 | $20 |
| Comprehensive metabolic blood panel | 743 | $10 | $64 |
| Complete blood count (CBC) with differential | 717 | $8 | $36 |
| Immunoglobulin level test | 474 | $9 | $56 |
| Dexamethasone injection (steroid) | 408 | $0 | $1 |
| Ferritin level test (iron stores) | 374 | $13 | $60 |
| Iron level test | 374 | $6 | $27 |
| Iron binding capacity test | 374 | $9 | $35 |
| Injection, granisetron hydrochloride, 100 mcg | 250 | $0 | $24 |
| Office visit, established patient (30-39 min) | 242 | $86 | $368 |
| Office visit, established patient (20-29 min) | 233 | $65 | $250 |
| Measurement of immunoglobulin light chains | 228 | $17 | $60 |
| Drug injection, under skin or into muscle | 129 | $11 | $96 |
| Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less | 115 | $22 | $157 |
| Infusion into a vein for therapy, prevention, or diagnosis, each additional hour | 107 | $15 | $100 |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 97 | $48 | $313 |
| Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle | 93 | $55 | $211 |
| Administration of chemotherapy into vein, 1 hour or less | 79 | $97 | $707 |
| Injection of additional new drug or substance into vein | 62 | $11 | $108 |
| Ct scan of chest with contrast | 61 | $40 | $821 |
| Lactate dehydrogenase (enzyme) level | 55 | $6 | $31 |
| Prothrombin time test (blood clotting) | 54 | $4 | $30 |
| CT scan of abdomen and pelvis with contrast | 53 | $155 | $1,067 |
| Microscopic examination for white blood cells with manual cell count | 53 | $4 | $22 |
| Complete blood count (CBC), automated | 53 | $6 | $34 |
| Injection, diphenhydramine hcl, up to 50 mg | 53 | $1 | $7 |
| Reticulated (young) platelet measurement | 51 | $35 | $143 |
| Administration of chemotherapy into vein, each additional hour | 29 | $21 | $161 |
| Office visit, established patient, complex (40-54 min) | 27 | $129 | $496 |
| Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 11-19 mev | 27 | $174 | $700 |
| Vitamin B-12 level test | 22 | $15 | $76 |
| Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session | 22 | $272 | $2,762 |
| Folic acid level test | 21 | $14 | $73 |
| Irrigation of implanted venous access drug delivery device | 20 | $19 | $114 |
| Office visit, established patient (10-19 min) | 20 | $37 | $150 |
| New patient office visit (30-44 min) | 16 | $61 | $372 |
| CT scan of chest, without contrast | 13 | $36 | $686 |
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. A higher procedure volume generally indicates more experience with that procedure.
48.4% high complexity
42.4% medium
9.2% routine
Industry Payment Transparency
Open Payments through 2024 ↗$14,482
Total received (2018-2024)
Avg $2,069/year across 7 years
Top 25% in TX for hematology & oncology
66
Companies
1,003
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$13,163 (90.9%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$881 (6.1%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$439 (3.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$30
2023
$30
2022
$349
2021
$159
2020
$1,377
2019
$6,898
2018
$5,637
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
AstraZeneca Pharmaceuticals LP
$1,221
Amgen Inc.
$1,152
Novartis Pharmaceuticals Corporation
$977
Genentech USA, Inc.
$770
GENZYME CORPORATION
$750
PFIZER INC.
$711
Merck Sharp & Dohme Corporation
$680
E.R. Squibb & Sons, L.L.C.
$670
Janssen Pharmaceuticals, Inc
$503
Janssen Biotech, Inc.
$499
Takeda Pharmaceuticals U.S.A., Inc.
$493
Incyte Corporation
$477
Celgene Corporation
$404
Astellas Pharma US Inc
$359
AbbVie, Inc.
$352
Bayer HealthCare Pharmaceuticals Inc.
$337
Alexion Pharmaceuticals, Inc.
$329
Eisai Inc.
$309
Lilly USA, LLC
$280
Ipsen Biopharmaceuticals, Inc
$274
Puma Biotechnology, Inc.
$230
Boehringer Ingelheim Pharmaceuticals, Inc.
$205
TESARO, Inc.
$184
Seattle Genetics, Inc.
$149
GlaxoSmithKline, LLC.
$135
Rigel Pharmaceuticals, Inc.
$134
EISAI INC.
$130
Daiichi Sankyo Inc.
$120
Taiho Oncology, Inc.
$105
Helsinn Therapeutics (U.S.), Inc.
$104
Jazz Pharmaceuticals Inc.
$102
Cardinal Health 110 LLC
$100
Exelixis Inc.
$97
JAZZ PHARMACEUTICALS INC.
$88
TerSera Therapeutics LLC
$71
Regeneron Healthcare Solutions, Inc.
$66
Lexicon Pharmaceuticals, Inc.
$60
TOLMAR Pharmaceuticals, Inc.
$57
AMAG Pharmaceuticals, Inc.
$56
Otsuka America Pharmaceutical, Inc.
$53
ARRAY BIOPHARMA INC
$48
Spectrum Pharmaceuticals Inc.
$48
EMD Serono, Inc.
$45
PUMA BIOTECHNOLOGY, INC.
$36
Teva Pharmaceuticals USA, Inc.
$35
Agios Pharmaceuticals, Inc.
$32
Apellis Pharmaceuticals, Inc.
$30
Medtronic USA, Inc.
$30
Array BioPharma Inc.
$29
Seagen Inc.
$29
Sandoz Inc.
$29
Pharmacyclics LLC, An AbbVie Company
$28
Foundation Medicine, Inc.
$26
Clovis Oncology, Inc.
$26
Gilead Sciences, Inc.
$25
Dova Pharmaceuticals
$24
EUSA Pharma (US) LLC
$23
Octapharma USA, Inc.
$22
R-Pharm US LLC
$21
SANOFI-AVENTIS U.S. LLC
$20
INSYS Therapeutics Inc
$17
Alnylam Pharmaceuticals Inc.
$15
Karyopharm Therapeutics Inc.
$13
Dendreon Pharmaceuticals LLC
$13
Advanced Accelerator Applications
$12
Kyowa Kirin, Inc.
$11
Top 3 companies account for 23.1% of total payments
Associated products mentioned in payments ›
ADCETRIS · AFINITOR · AKYNZEO · ALIMTA · ALOXI · Abraxane · Alecensa · Aliqopa · Avastin · BALVERSA · BAVENCIO · BENDEKA · BLENREP · BOSULIF · BRAFTOVI · Balversa · Bavencio · Blincyto · Braftovi · CABLIVI · CALQUENCE · CYRAMZA · Cabometyx · DARZALEX · Doptelet · ELIGARD · ELIQUIS · ELITEK · EMEND · EMPLICITI · ERBITUX · ERLEADA · Empaveli · Enhertu · Erleada · FARESTON · FERAHEME · FOUNDATIONONE · Folotyn · GAZYVA · GILOTRIF · GIVLAARI · Halaven · IBRANCE · IDHIFA · IMBRUVICA · IMFINZI · INJECTAFER · INLYTA · Imbruvica · Inrebic · Ixempra · JADENU · JAKAFI · JEVTANA · KANJINTI · KEYTRUDA · KISQALI · Kyprolis · LIBTAYO · LIBTAYO CEMIPLIMAB-RWLC INJECTION · LUMAKRAS · LYNPARZA · Lenvima · Lonsurf · Lupron · Lupron Depot · Lutathera · MEKINIST · MVASI · MYLOTARG · NERLYNX · NINLARO · Nerlynx · Neulasta · Nexavar · Nplate · OPDIVO · OSTEOCOOL RF ABLATION · Onivyde · PADCEV · PIQRAY · PROMACTA · PROVENGE · Perjeta · Pomalyst · RYDAPT · Revlimid · Rituxan Hycela · Rubraca · SANDOSTATIN · SOLIRIS · SOMATULINE DEPOT · SPRYCEL · SUTENT · SYNDROS · Stivarga · Sylvant · TAGRISSO · TASIGNA · TECENTRIQ · Tavalisse · ULTOMIRIS · VENCLEXTA · VOTRIENT · VYXEOS · Vectibix · Venclexta · Vitrakvi · WILATE · XALKORI · XARELTO · XGEVA · XOSPATA · XPOVIO · XTANDI · Xermelo · Xofigo · ZARXIO · ZEJULA · ZOLADEX · ZYKADIA
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. 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 →
Most payments (91%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Equivalent to $27 per 100 Medicare services performed
Geographic Context
Hematology & oncology specialists within 10 mi
56
Per 100K population
2.7
County median income
$70,571
Nearest hospital
UNIVERSITY HEALTH SYSTEM
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Guzley is a mixed practice specialist, with above-average Medicare volume (top 17% in TX), with low-engagement industry engagement, with 20 years of NPI registration.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Guzley experienced with iron infusion (feraheme)?
Based on Medicare claims data, Dr. Guzley performed 23,970 iron infusion (feraheme) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Guzley receive payments from pharmaceutical companies?
Yes. Dr. Guzley received a total of $14,482 from 66 companies across 1,003 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. 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. Guzley's costs compare to other hematology & oncology specialists in San Antonio?
Dr. Guzley's average Medicare payment per service is $4. 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. Guzley) 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 a long track record of practice, Medicare participation, and industry disclosure. 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?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): 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. The Transparency Score measures 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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