Medicare Enrolled
Dr. Thomas Williamson, M.D.
Hematology & Oncology · Winston Salem, NC
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. Williamson 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. Williamson
Dr. Thomas Williamson is a hematology & oncology specialist in Winston Salem, NC, with 12 years of NPI registration. Based on federal Medicare data, Dr. Williamson performed 178,262 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Williamson received a total of $6,670 from 62 pharmaceutical and/or device companies across 343 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. Williamson 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.
✓ 12 years of NPI registration
▲ Top 1% volume in NC
$6,670 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗178,262
Medicare services
Top 1% in NC for hematology & oncology
Not available
Unique patients (not deduplicated)
$13
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. |
54,000 | $1 | $3 |
| Pembrolizumab injection (Keytruda) | 22,400 | $37 | $120 |
| Anti-nausea injection (aprepitant) | 19,890 | $1 | $8 |
| Nivolumab injection (Opdivo) | 18,160 | $24 | $55 |
| Denosumab injection (Prolia/Xgeva) | 12,240 | $18 | $44 |
| Oxaliplatin chemotherapy injection This procedure involves the administration of oxaliplatin, a chemotherapy medication, via injection. The dosage specified is 0.5 mg. |
9,800 | $0 | $18 |
| 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. |
6,030 | $34 | $150 |
| Paclitaxel chemotherapy injection | 4,980 | $0 | $7 |
| Bortezomib injection, 0.1 mg Administration of a 0.1 mg dose of bortezomib medication via injection. |
4,900 | $4 | $118 |
| Rituximab and hyaluronidase injection An injection containing rituximab and hyaluronidase administered to the patient. |
4,260 | $29 | $120 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
3,336 | $0 | $2 |
| Anti-nausea injection (Aloxi/palonosetron) | 2,330 | $1 | $60 |
| 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. |
1,652 | $7 | $48 |
| Rituximab injection, 10 mg Administration of a 10 mg dose of rituximab medication via injection. |
1,630 | $64 | $212 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,456 | $8 | $22 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,450 | $10 | $100 |
| 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. |
1,084 | $84 | $251 |
| Injection, leucovorin calcium, per 50 mg | 986 | $3 | $30 |
| 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. |
852 | $80 | $1,125 |
| Fluorouracil injection, 500 mg Administration of a 500 mg dose of fluorouracil medication via injection. |
616 | $2 | $10 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
487 | $81 | $415 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
452 | $10 | $75 |
| 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. |
436 | $10 | $58 |
| Injection, fulvestrant, 25 mg | 400 | $8 | $242 |
| 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. |
366 | $18 | $116 |
| Carboplatin chemotherapy injection, 50 mg Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection. |
301 | $2 | $50 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
256 | $13 | $90 |
| Immunoglobulin light chain measurement A blood test that measures the levels of immunoglobulin light chains, which are proteins produced by plasma cells. |
255 | $17 | $125 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
212 | $50 | $165 |
| 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. |
211 | $56 | $170 |
| 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. |
174 | $42 | $207 |
| Injection, gemcitabine hydrochloride, not otherwise specified, 200 mg | 168 | $3 | $100 |
| Iron level test | 166 | $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. |
166 | $9 | $45 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
154 | $19 | $111 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
142 | $16 | $112 |
| 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. |
141 | $41 | $200 |
| Red blood cell concentration measurement A laboratory test that measures the concentration of red blood cells in the blood. |
134 | $2 | $22 |
| Hemoglobin blood test A blood test that measures the amount of hemoglobin, the protein in red blood cells that carries oxygen. |
134 | $2 | $22 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
128 | $8 | $65 |
| 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. |
118 | $118 | $338 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
99 | $14 | $75 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
92 | $1 | $18 |
| 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. |
91 | $95 | $326 |
| 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. |
75 | $16 | $80 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
71 | $14 | $77 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
71 | $1 | $15 |
| On-body injector for subcutaneous injection A device is applied to the skin to automatically deliver a medication injection under the skin. |
65 | $13 | $75 |
| 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. |
65 | $113 | $430 |
| 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. |
60 | $32 | $175 |
| Manual white blood cell count A laboratory test that involves examining a sample under a microscope to manually count the number of white blood cells present. |
54 | $4 | $30 |
| Complete blood count (CBC), automated An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood. |
54 | $6 | $41 |
| 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. |
48 | $6 | $35 |
| 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. |
47 | $119 | $382 |
| 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. |
43 | $23 | $100 |
| Venipuncture for blood collection A procedure to draw blood from a vein for medical testing or analysis. |
43 | $53 | $219 |
| 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. |
41 | $74 | $253 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
33 | $15 | $60 |
| 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. |
31 | $54 | $173 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
30 | $16 | $55 |
| Automated red blood cell count An automated laboratory test that measures the number of red blood cells in a blood sample. |
25 | $4 | $35 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
24 | $14 | $98 |
| Hospital follow-up visit, low complexity Follow-up hospital visit for an established patient with straightforward or low-level medical decision making. The visit requires at least 25 minutes of time spent on the day of service. |
18 | $31 | $100 |
| Initial hospital admission, low complexity Initial hospital inpatient or observation care for a new patient involving straightforward or low-level medical decision making, with at least 40 minutes total time on the date of the encounter. |
16 | $61 | $240 |
| New patient office visit, complex (60-74 min) | 13 | $160 | $482 |
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.
34.4% high complexity
61.0% medium
4.5% routine
Industry Payment Transparency
Open Payments through 2024 ↗$6,670
Total received (2018-2024)
Avg $953/year across 7 years
Top 30% in NC for hematology & oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
62
Companies
343
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
$2,198
2023
$1,940
2022
$1,528
2021
$657
2020
$95
2019
$212
2018
$42
Payments by company (2024)
Daiichi Sankyo Inc.
$217
Gilead Sciences, Inc.
$209
Celgene Corporation
$168
Janssen Biotech, Inc.
$167
Takeda Pharmaceuticals U.S.A., Inc.
$128
Merck Sharp & Dohme LLC
$110
Genentech USA, Inc.
$103
AstraZeneca Pharmaceuticals LP
$96
PFIZER INC.
$94
Pharmacosmos Therapeutics Inc.
$74
Lilly USA, LLC
$68
Novartis Pharmaceuticals Corporation
$64
GENZYME CORPORATION
$63
Incyte Corporation
$62
Deciphera Pharmaceuticals Inc.
$55
E.R. Squibb & Sons, L.L.C.
$51
BeiGene USA, Inc.
$45
Bayer Healthcare Pharmaceuticals Inc.
$45
GlaxoSmithKline, LLC.
$39
ARRAY BIOPHARMA INC
$38
SOBI, INC
$27
Aveo Pharmaceuticals, Inc.
$25
SUN PHARMACEUTICAL INDUSTRIES INC.
$24
Stemline Therapeutics Inc.
$24
Inari Medical, Inc.
$21
JAZZ PHARMACEUTICALS INC.
$20
Ipsen Biopharmaceuticals, Inc
$20
Eisai Inc.
$20
RECORDATI_RARE_DISEASES_INC.
$19
Astellas Pharma US Inc
$19
Kite Pharma, Inc.
$18
Apellis Pharmaceuticals, Inc.
$17
SpringWorks Therapeutics, Inc.
$17
Genmab U.S., Inc.
$17
Exelixis Inc.
$16
Top 3 companies account for 27.0% of 2024 payments
All-time payments by company (2018-2024) ›
Genentech USA, Inc.
$567
Merck Sharp & Dohme LLC
$443
PFIZER INC.
$413
Novartis Pharmaceuticals Corporation
$401
Daiichi Sankyo Inc.
$390
Gilead Sciences, Inc.
$375
Celgene Corporation
$276
GENZYME CORPORATION
$252
Takeda Pharmaceuticals U.S.A., Inc.
$245
Janssen Biotech, Inc.
$240
Incyte Corporation
$221
BeiGene USA, Inc.
$185
E.R. Squibb & Sons, L.L.C.
$185
Deciphera Pharmaceuticals Inc.
$174
Seagen Inc.
$162
AstraZeneca Pharmaceuticals LP
$157
Abbott Laboratories
$145
Lilly USA, LLC
$99
Pharmacosmos Therapeutics Inc.
$98
Bayer Healthcare Pharmaceuticals Inc.
$96
GlaxoSmithKline, LLC.
$90
Astellas Pharma US Inc
$86
Rigel Pharmaceuticals, Inc.
$71
Stemline Therapeutics Inc.
$71
Eisai Inc.
$68
EMD Serono, Inc.
$64
Karyopharm Therapeutics Inc.
$61
Ipsen Biopharmaceuticals, Inc
$60
MorphoSys, US Inc.
$60
JAZZ PHARMACEUTICALS INC.
$55
Amgen Inc.
$55
Pharmacyclics LLC, an AbbVie Company
$49
ARRAY BIOPHARMA INC
$49
Regeneron Healthcare Solutions, Inc.
$47
Aveo Pharmaceuticals, Inc.
$46
SERVIER PHARMACEUTICALS LLC
$36
Kite Pharma, Inc.
$34
Mirati Therapeutics, Inc.
$34
G1 Therapeutics, Inc.
$34
Genmab U.S., Inc.
$33
Exelixis Inc.
$32
PUMA BIOTECHNOLOGY, INC.
$32
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$29
CTI BioPharma Corp.
$29
SOBI, INC
$27
PharmaEssentia USA Corporation
$27
SUN PHARMACEUTICAL INDUSTRIES INC.
$24
Inari Medical, Inc.
$21
Alexion Pharmaceuticals, Inc.
$20
Acceleron Pharma, Inc.
$19
RECORDATI_RARE_DISEASES_INC.
$19
Coherus Biosciences Inc.
$19
TAIHO ONCOLOGY, INC.
$18
Sobi, Inc
$18
Apellis Pharmaceuticals, Inc.
$17
SpringWorks Therapeutics, Inc.
$17
Puma Biotechnology, Inc.
$16
Pharmacyclics LLC, An AbbVie Company
$14
ADC Therapeutics America, Inc.
$14
Merck Sharp & Dohme Corporation
$13
Novo Nordisk Inc
$13
SECURA BIO, INC.
$7
Top 3 companies account for 21.3% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · ALUNBRIG · AMPLATZER Occluders · BAVENCIO · BESREMI · BLENREP · BOSULIF · BRAFTOVI · BRUKINSA · CABLIVI · CABOMETYX · COPIKTRA · COSELA · DARZALEX · DOPTELET · ENHERTU · ENJAYMO · ERLEADA · EXKIVITY · Empaveli · Enhertu · Epkinly · FLOWTRIEVER CATHETER · FOTIVDA · FRUZAQLA · Fabhalta · FreeStyle Libre 2 · IBRANCE · ICLUSIG · IMBRUVICA · IMFINZI · INJECTAFER · INLYTA · Itovebi · JAKAFI · JAYPIRCA · JEVTANA · KEYTRUDA · KISQALI · KRAZATI · LIBTAYO · LONSURF · LUMAKRAS · LUTATHERA · LYNPARZA · Lenvima · MEKINIST · MONJUVI · MONOFERRIC · NERLYNX · NINLARO · Nplate · OGSIVEO · OJJAARA · OPDIVO · Onivyde · Orserdu · PADCEV · PIQRAY · PLUVICTO · PROMACTA · Padcev · Phesgo · Polivy · Pomalyst · QINLOCK · REBLOZYL · RELISTOR · RETEVMO · RYBREVANT · Reblozyl · Rezlidhia · S · SARCLISA · SOMATULINE DEPOT · SYLVANT · Stivarga · TAGRISSO · TASIGNA · TECVAYLI · TIBSOVO · TUKYSA · Tavalisse · Tazverik · Tibsovo · Trodelvy · ULTOMIRIS · Udenyca · VELCADE · VENCLEXTA · VERZENIO · Venclexta · Vonjo · XALKORI · XOSPATA · XPOVIO · XTANDI · Xospata · YONSA · Yescarta · ZEJULA · ZEPZELCA
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 →
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. Williamson is a mixed practice specialist, with above-average Medicare volume (top 1% in NC).
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Williamson experienced with iron infusion (injectafer)?
Based on Medicare claims data, Dr. Williamson performed 54,000 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. Williamson receive payments from pharmaceutical companies?
Yes. Dr. Williamson received a total of $6,670 from 62 companies across 343 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. Williamson's costs compare to other hematology & oncology specialists in Winston Salem?
Dr. Williamson's average Medicare payment per service is $13. 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. Williamson) 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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