Medicare Enrolled
Dr. Santiago Marroquin, MD
Radiation Oncology · Victoria, 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. Marroquin 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. Marroquin
Dr. Santiago Marroquin is a radiation oncology specialist in Victoria, TX, with 19 years of NPI registration. Based on federal Medicare data, Dr. Marroquin performed 18,426 Medicare services across 15,293 unique beneficiaries.
Between the years covered by Open Payments, Dr. Marroquin received a total of $4,650 from 17 pharmaceutical and/or device companies across 68 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in radiation 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. Marroquin 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.
✓ 19 years in practice
▲ Top 3% volume in TX
$4,650 industry payments
Medicare Practice Summary
Medicare Utilization ↗18,426
Medicare services
Top 3% in TX for radiation oncology
15,293
Unique beneficiaries
$23
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~970 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 |
|---|---|---|---|
| Chest X-ray, 1 view | 3,941 | $6 | $45 |
| Chest X-ray, 2 views | 1,320 | $7 | $57 |
| 3d radiographic procedure with computerized image postprocessing | 1,184 | $27 | $125 |
| CT scan of head/brain, without contrast | 884 | $28 | $170 |
| Screening mammography | 722 | $35 | $140 |
| 3D screening mammography (tomosynthesis) | 626 | $28 | $100 |
| X-ray of abdomen, 1 view | 427 | $6 | $45 |
| X-ray of knee, 1-2 views | 380 | $5 | $36 |
| Ct scan of abdomen and pelvis before and after contrast | 380 | $67 | $300 |
| Ct scan of abdomen and pelvis without contrast | 356 | $58 | $255 |
| Shoulder X-ray, 2+ views | 320 | $6 | $35 |
| CT scan of chest, without contrast | 307 | $35 | $196 |
| Bone density scan (DEXA) | 270 | $9 | $56 |
| Ct scan of upper spine without contrast | 254 | $33 | $196 |
| Hip X-ray, 2-3 views | 254 | $7 | $46 |
| Complete ultrasound scan behind abdominal cavity | 249 | $24 | $132 |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 226 | $9 | $210 |
| Ct scan of blood vessels of chest with contrast | 222 | $61 | $318 |
| Mri scan of lower spinal canal without contrast | 216 | $50 | $250 |
| Limited ultrasound scan of abdomen | 198 | $19 | $104 |
| X-ray of hand, minimum of 3 views | 197 | $6 | $45 |
| Foot X-ray, 3+ views | 195 | $5 | $51 |
| X-ray of lower and sacral spine, 2-3 views | 182 | $7 | $39 |
| CT scan of abdomen and pelvis with contrast | 172 | $58 | $275 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 168 | $52 | $145 |
| X-ray of spine, 1 view | 156 | $6 | $28 |
| Nuclear medicine study from skull base to mid-thigh with ct scan | 152 | $82 | $430 |
| Mri scan of brain without contrast | 150 | $45 | $250 |
| Ct scan of chest before and after contrast | 139 | $39 | $232 |
| Ultrasound study of one arm or leg veins with compression and maneuvers | 108 | $15 | $113 |
| Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) | 105 | $20 | $125 |
| X-ray of wrist, minimum of 3 views | 103 | $5 | $31 |
| X-ray of ankle, minimum of 3 views | 99 | $5 | $45 |
| Mri scan of brain before and after contrast | 91 | $79 | $491 |
| Ct scan of lower spine without contrast | 85 | $33 | $196 |
| Ultrasound study of arm or leg veins with compression and maneuvers | 85 | $24 | $182 |
| Ultrasound scan of head and neck soft tissue | 84 | $19 | $111 |
| Ultrasound of both sides of head and neck blood flow | 82 | $26 | $182 |
| Ct scan of blood vessels of head with contrast | 81 | $56 | $293 |
| Review by radiologist of ct guidance for needle placement | 81 | $53 | $337 |
| X-ray of upper spine, 2-3 views | 79 | $7 | $38 |
| Mri scan of leg joint without contrast | 76 | $43 | $225 |
| X-ray of abdomen, 2 views | 76 | $8 | $46 |
| Mri scan of arm joint without contrast | 75 | $47 | $225 |
| Diagnostic mammography of 1 breast | 75 | $25 | $140 |
| Ct scan of blood vessels of neck with contrast | 73 | $58 | $293 |
| Ct scan of chest with contrast | 71 | $38 | $208 |
| Knee X-ray, 3 views | 71 | $6 | $45 |
| Ultrasonic guidance for blood vessel access | 70 | $11 | $75 |
| Mri scan of upper spinal canal without contrast | 69 | $49 | $270 |
| Complete ultrasound scan of 1 breast | 67 | $25 | $214 |
| Dxa bone density measurement of hip, pelvis, spine including spine fracture assessment | 64 | $14 | $75 |
| Ct scan of face without contrast | 62 | $29 | $192 |
| X-ray of lower and sacral spine, minimum of 4 views | 61 | $8 | $55 |
| Imaging for evaluation of swallowing function | 60 | $18 | $90 |
| Complete ultrasound scan of abdomen | 60 | $28 | $162 |
| X-ray of lower leg, 2 views | 59 | $5 | $29 |
| Ct scan of pelvis without contrast | 56 | $36 | $184 |
| Mri scan of blood vessels of head without contrast | 54 | $36 | $202 |
| X-ray of pelvis, 1-2 views | 54 | $6 | $31 |
| Single contrast x-ray of upper digestive tract | 53 | $28 | $116 |
| Single contrast x-ray of esophagus | 52 | $21 | $77 |
| Aspiration of fluid from chest cavity using imaging guidance | 51 | $75 | $160 |
| Diagnostic mammography of both breasts | 50 | $31 | $150 |
| X-ray of elbow, 2 views | 48 | $5 | $31 |
| Fluoroscopic guidance for needle placement | 48 | $19 | $92 |
| Joint injection, major joint | 46 | $32 | $193 |
| Limited ultrasound scan of joint or other extremity structure except blood vessels | 43 | $24 | $75 |
| X-ray of thigh bone, minimum 2 views | 41 | $7 | $39 |
| X-ray of middle spine, 3 views | 40 | $7 | $40 |
| Ct scan of leg without contrast | 40 | $33 | $184 |
| Biopsy and aspiration of bone marrow sample for diagnosis | 38 | $55 | $310 |
| Ct scan of abdominal aorta and both leg arteries with contrast | 38 | $81 | $400 |
| Drainage of fluid from abdominal cavity using imaging guidance | 37 | $68 | $550 |
| Ultrasonic guidance for needle placement | 36 | $23 | $225 |
| Nuclear medicine study of bone and/or joint whole body | 34 | $29 | $146 |
| X-ray of ribs on side of body, 2 views | 32 | $6 | $38 |
| X-ray of forearm, 2 views | 31 | $5 | $31 |
| Nuclear medicine study of liver and bile duct system with use of drugs | 31 | $29 | $150 |
| Core needle biopsy of lung or center cavity of chest (mediastinum), accessed through skin | 30 | $109 | $600 |
| Mri scan of blood vessels of neck without contrast | 30 | $36 | $202 |
| X-ray of upper spine, 4-5 views | 30 | $8 | $53 |
| Ultrasound scan of scrotum | 30 | $19 | $127 |
| X-ray of hip, 1 view | 29 | $6 | $39 |
| X-ray of both hips, 3-4 views | 29 | $8 | $62 |
| Fluoroscopic guidance for insertion or removal of central vein access device | 29 | $13 | $75 |
| X-ray of knee, 4 or more views | 27 | $7 | $47 |
| X-ray of both hips, 2 views | 26 | $8 | $48 |
| Ultrasound study of arm and leg arteries | 26 | $8 | $172 |
| X-ray of finger, minimum of 2 views | 25 | $4 | $25 |
| Mri scan of abdomen before and after contrast | 25 | $71 | $452 |
| Biopsy of breast and placement of locating device using ultrasound, first growth | 24 | $112 | $525 |
| Ct scan of middle spine without contrast | 24 | $34 | $196 |
| X-ray of upper arm, minimum of 2 views | 24 | $5 | $31 |
| Dxa bone density measurement of forearm, finger, hand, or foot | 24 | $9 | $56 |
| Insertion of central venous tube with port (5 years or older) | 23 | $244 | $1,200 |
| Needle biopsy of thyroid through skin | 23 | $52 | $284 |
| X-ray lower and sacral spine, minimum of 6 views | 22 | $10 | $80 |
| Needle biopsy of kidney | 21 | $78 | $675 |
| Low dose ct scan of chest for lung cancer screening | 21 | $50 | $200 |
| Ct scan of abdomen before and after contrast | 21 | $46 | $236 |
| Mri scan of abdomen without contrast | 21 | $51 | $243 |
| Ct scan of blood vessels and grafts of heart with contrast | 21 | $77 | $500 |
| Insertion of tunneled central venous tube for infusion (5 years or older) | 20 | $181 | $1,050 |
| Ct scan of arm without contrast | 20 | $33 | $184 |
| Ultrasound of leg arteries or artery grafts | 20 | $29 | $172 |
| X-ray of wrist, 2 views | 19 | $6 | $29 |
| Removal of tunneled central venous tube | 18 | $98 | $350 |
| Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist | 18 | $173 | $900 |
| Mri scan of middle spinal canal without contrast | 18 | $51 | $270 |
| Mri scan of leg without contrast | 18 | $50 | $225 |
| Limited ultrasound scan of 1 breast | 18 | $25 | $183 |
| Complete ultrasound scan of pelvis | 18 | $22 | $116 |
| Nuclear medicine study of lung circulation | 18 | $25 | $126 |
| Removal of spinal fluid with lower back spinal tap for diagnostic test using imaging guidance | 17 | $58 | $350 |
| Ct scan of blood vessels of abdomen and pelvis with contrast | 16 | $72 | $550 |
| Follow-through x-ray of small intestines | 16 | $26 | $150 |
| X-ray of paranasal sinus, minimum of 3 views | 15 | $6 | $42 |
| Needle biopsy or removal of surface lymph nodes | 14 | $50 | $375 |
| Single contrast x-ray of small intestine | 14 | $29 | $175 |
| Ct scan of soft tissue of neck before and after contrast | 13 | $59 | $244 |
| X-ray of elbow, minimum of 3 views | 13 | $5 | $37 |
| Needle biopsy of growth of abdominal cavity | 12 | $58 | $415 |
| X-ray of sacrum and tailbone, minimum of 2 views | 12 | $5 | $31 |
| Ct scan of abdomen without contrast | 12 | $44 | $201 |
| Ct scan of blood vessels of abdomen with contrast | 12 | $66 | $313 |
| Ultrasound scan of abdominal aorta | 12 | $25 | $115 |
| Needle biopsy of liver through skin | 11 | $55 | $511 |
| Mri scan of lower spinal canal before and after contrast | 11 | $76 | $522 |
| Mri scan of pelvis before and after contrast | 11 | $73 | $452 |
| X-ray of toe, minimum of 2 views | 11 | $4 | $25 |
| Nuclear medicine study of parathyroid | 11 | $26 | $139 |
| Nuclear medicine study of lymphatic system | 11 | $43 | $204 |
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.
0.1% high complexity
33.5% medium
66.4% routine
Industry Payment Transparency
Open Payments through 2024 ↗$4,650
Total received (2018-2024)
Avg $664/year across 7 years
Top 12% in TX for radiation oncology
17
Companies
68
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
$4,650 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$187
2023
$337
2022
$811
2021
$695
2020
$182
2019
$408
2018
$2,030
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Bard Peripheral Vascular, Inc.
$2,068
Medtronic, Inc.
$675
Stryker Corporation
$464
Boston Scientific Corporation
$282
Medtronic USA, Inc.
$281
Inari Medical, Inc.
$267
Janssen Pharmaceuticals, Inc
$152
BARD PERIPHERAL VASCULAR, INC.
$111
AngioDynamics, Inc.
$96
Siemens Medical Solutions USA, Inc.
$62
Covidien LP
$48
Lantheus Medical Imaging, Inc.
$37
JAZZ PHARMACEUTICALS INC.
$28
Cardinal Health 414, LLC
$21
BOSTON SCIENTIFIC CORPORATION
$21
Cardiovascular Systems Inc.
$19
Mozarc Medical US LLC
$16
Top 3 companies account for 69.0% of total payments
Associated products mentioned in payments ›
AngioDynamics · BioFlo · CROSSER · CT THROMBECTOMY SYSTEM KIT · DEFINITY · DuraFlow · Emprint · FLOWTRIEVER CATHETER · GENERAL - VASCULAR INTERVENTION · IVAS · KYPHON Balloon Kyphoplasty · KYPHON EXPRESS II KYPHOPAK TRAY · LUTONIX · Lutonix Drug Coated Balloon · Lymphoseek · MAGNETOM Altea · OSTEOCOOL RF ABLATION SYSTEM · PALINDROME · Peripheral Orbital Atherectomy System · S · SPINEJACK · Smart Port CT · TheraSphere Y90 Glass Microspheres 10 GBq · XARELTO · ZEPZELCA
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 (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Equivalent to $25 per 100 Medicare services performed
Geographic Context
Radiation oncologists within 10 mi
10
Per 100K population
11.0
County median income
$70,101
Nearest hospital
CITIZENS MEDICAL CENTER
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. Marroquin is a mixed practice specialist, with above-average Medicare volume (top 3% in TX), with low-engagement industry engagement in the top 12% of TX peers, with 19 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. Marroquin experienced with chest x-ray, 1 view?
Based on Medicare claims data, Dr. Marroquin performed 3,941 chest x-ray, 1 view 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. Marroquin receive payments from pharmaceutical companies?
Yes. Dr. Marroquin received a total of $4,650 from 17 companies across 68 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. Marroquin's costs compare to other radiation oncologists in Victoria?
Dr. Marroquin's average Medicare payment per service is $23. 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. Marroquin) 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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