Medicare Enrolled
Dr. Nathan Shumway, D.O., FACP
Medical Oncology · San Antonio, TX
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. Shumway 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. Shumway
Dr. Nathan Shumway is a medical oncology specialist in San Antonio, TX, with 20 years of NPI registration. Based on federal Medicare data, Dr. Shumway performed 72,895 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Shumway received a total of $6,186 from 29 pharmaceutical and/or device companies across 52 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. Shumway 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 14% volume in TX
$6,186 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗72,895
Medicare services
Top 14% in TX for medical oncology
Not available
Unique patients (not deduplicated)
$8
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. |
22,440 | $0 | $5 |
| Iron sucrose injection (Venofer) An injection of iron sucrose used to replenish iron levels in the body. |
20,900 | $0 | $2 |
| Anti-nausea injection (fosaprepitant) An injection of fosaprepitant, a medication used to prevent nausea and vomiting. |
8,850 | $0 | $5 |
| Pembrolizumab injection (Keytruda) | 7,400 | $43 | $137 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
2,002 | $0 | $1 |
| 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. |
1,211 | $8 | $36 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,146 | $10 | $64 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,139 | $8 | $20 |
| Anti-nausea injection (Aloxi/palonosetron) | 890 | $1 | $114 |
| Flow cytometry, additional marker An additional marker is tested during a flow cytometry procedure to analyze DNA or cells. This step adds specific data points to the initial analysis. |
617 | $18 | $180 |
| 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. |
509 | $59 | $250 |
| Injection, granisetron hydrochloride, 100 mcg | 470 | $0 | $24 |
| 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. |
354 | $89 | $368 |
| 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. |
349 | $19 | $99 |
| Immunoglobulin level test A blood test that measures the level of gammaglobulins, which are immune system proteins. |
312 | $9 | $56 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
300 | $97 | $707 |
| 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. |
267 | $22 | $157 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
265 | $13 | $60 |
| Iron level test | 265 | $6 | $27 |
| 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. |
265 | $9 | $35 |
| Carboplatin chemotherapy injection, 50 mg Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection. |
261 | $2 | $300 |
| Immunoglobulin light chain measurement A blood test that measures the levels of immunoglobulin light chains, which are proteins produced by plasma cells. |
260 | $17 | $60 |
| 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. |
223 | $10 | $96 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
215 | $6 | $431 |
| 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. |
178 | $46 | $313 |
| Prothrombin time test (blood clotting) A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process. |
111 | $4 | $30 |
| 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. |
85 | $4 | $22 |
| 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. |
82 | $6 | $31 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
82 | $11 | $108 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
81 | $55 | $211 |
| Leuprolide acetate (for depot suspension), 7.5 mg | 81 | $133 | $3,675 |
| 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. |
80 | $6 | $34 |
| 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. |
80 | $49 | $344 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
77 | $1 | $7 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
73 | $21 | $161 |
| Reticulated platelet measurement A blood test that measures the level of young, newly formed platelets in the body. |
71 | $35 | $143 |
| Venipuncture for blood collection A procedure to draw blood from a vein for medical testing or analysis. |
70 | $65 | $264 |
| 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. |
64 | $18 | $114 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
61 | $16 | $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. |
55 | $110 | $565 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
55 | $1 | $17 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
51 | $1 | $8 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
47 | $15 | $76 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
44 | $14 | $73 |
| Haptoglobin level test A blood test that measures the amount of haptoglobin, a protein in the serum. It helps evaluate red blood cell breakdown. |
41 | $12 | $66 |
| Serum protein measurement A blood test that measures the total amount of protein in the serum. It helps evaluate overall health and nutritional status. |
36 | $10 | $99 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
36 | $87 | $357 |
| 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. |
35 | $21 | $160 |
| 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. |
33 | $25 | $145 |
| Automated red blood cell count with calculations A blood test that automatically counts red blood cells and performs additional calculations to assess blood health. |
31 | $5 | $26 |
| 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. |
31 | $124 | $500 |
| 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. |
30 | $2 | $19 |
| 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. |
27 | $61 | $247 |
| Coagulation assessment blood test A blood test that measures how long it takes for blood to clot. The sample can be plasma or whole blood. |
26 | $6 | $52 |
| Flow cytometry DNA or cell analysis, first marker A laboratory test that uses a laser to analyze cells or DNA by detecting a specific marker on the cell surface or within the cell. |
25 | $56 | $298 |
| 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. |
17 | $25 | $256 |
| New patient office visit, complex (60-74 min) | 17 | $157 | $709 |
| Uric acid level test A blood test that measures the level of uric acid in your body. Uric acid is a waste product formed when the body breaks down purines. |
16 | $4 | $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. |
16 | $10 | $75 |
| 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. |
15 | $137 | $496 |
| Beta-2 microglobulin level test A blood test that measures the level of beta-2 microglobulin, a protein produced by cells in the body. |
13 | $16 | $96 |
| Stool test for blood to screen for colon tumors A test that analyzes a stool sample to detect hidden blood, which is used to screen for colon tumors. |
12 | $4 | $24 |
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.
32.0% high complexity
57.1% medium
10.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$6,186
Total received (2018-2024)
Avg $884/year across 7 years
Top 44% in TX for medical oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
29
Companies
52
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
$2,686
2023
$1,715
2022
$436
2021
$96
2020
$126
2019
$844
2018
$282
Payments by company (2024)
AstraZeneca Pharmaceuticals LP
$1,837
OnMark, Inc.
$269
GENZYME CORPORATION
$189
Genmab U.S., Inc.
$125
Bayer Healthcare Pharmaceuticals Inc.
$125
Takeda Pharmaceuticals U.S.A., Inc.
$100
Fennec Pharmaceuticals, Inc.
$24
Regeneron Healthcare Solutions, Inc.
$17
Top 3 companies account for 85.4% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$1,878
Stryker Corporation
$1,188
Takeda Pharmaceuticals U.S.A., Inc.
$338
OnMark, Inc.
$269
Amgen Inc.
$252
E.R. Squibb & Sons, L.L.C.
$207
GENZYME CORPORATION
$189
Exelixis Inc.
$156
Gilead Sciences, Inc.
$150
EMD Serono, Inc.
$126
Genmab U.S., Inc.
$125
Bayer Healthcare Pharmaceuticals Inc.
$125
ImmunoGen, Inc.
$125
G1 Therapeutics, Inc.
$125
Janssen Biotech, Inc.
$125
Rigel Pharmaceuticals, Inc.
$119
Sirtex Medical Inc
$117
PFIZER INC.
$103
Merck Sharp & Dohme LLC
$101
AbbVie, Inc.
$100
Verastem, Inc.
$89
Kite Pharma, Inc.
$46
Lilly USA, LLC
$33
Fennec Pharmaceuticals, Inc.
$24
PUMA BIOTECHNOLOGY, INC.
$18
BAXTER HEALTHCARE
$17
Regeneron Healthcare Solutions, Inc.
$17
Array BioPharma Inc.
$13
Clovis Oncology, Inc.
$10
Top 3 companies account for 55.0% of all-time payments
Associated products mentioned in payments ›
BRAFTOVI · Bavencio · Braftovi · COSELA · Cabometyx · Copiktra · DARZALEX · EXKIVITY · Elahere · Epkinly · FRUZAQLA · IMFINZI · INBONE · KEYTRUDA · LIBTAYO · LUMAKRAS · NERLYNX · Nubeqa · OPDIVO · Pedmark · Renal - Prismaflex TPE sets · Rubraca · SARCLISA · SIR-Spheres Microspheres · TAGRISSO · TALZENNA · Tavalisse · Trodelvy · VERZENIO · Vectibix · Venclexta · Yescarta
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
Medical oncologists in nearby ZIP areas
38
County median income
$70,571
Nearest hospital to ZIP centroid (approximate)
SOUTH TEXAS SPINE AND SURGICAL HOSPITAL
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. Shumway is a mixed practice specialist, with above-average Medicare volume (top 14% in TX), 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. Shumway experienced with iron infusion (feraheme)?
Based on Medicare claims data, Dr. Shumway performed 22,440 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. Shumway receive payments from pharmaceutical companies?
Yes. Dr. Shumway received a total of $6,186 from 29 companies across 52 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. Shumway's costs compare to other medical oncologists in San Antonio?
Dr. Shumway's average Medicare payment per service is $8. 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. Shumway) 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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