Medicare Enrolled
Dr. Marc Alonzo, MD
Vascular & Interventional Radiology Physician · Evanston, IL
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. Alonzo 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. Alonzo?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Alonzo
Dr. Marc Alonzo is a vascular & interventional radiology physician in Evanston, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Alonzo performed 1,094 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Alonzo received a total of $165,046 from 16 pharmaceutical and/or device companies across 148 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. Alonzo 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
▲ 1,094 Medicare services
$165,046 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗1,094
Medicare services
Bottom 40% in IL for vascular & interventional radiology physician
Not available
Unique patients (not deduplicated)
$74
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 |
|---|---|---|---|
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
151 | $11 | $42 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
107 | $13 | $57 |
| Fluoroscopic guidance for central vein access device Use of live X-ray imaging to guide the placement or removal of a central vein access device. |
76 | $16 | $63 |
| Abdominal fluid drainage with imaging guidance Removal of fluid from the abdominal cavity using imaging technology to guide the procedure. |
74 | $80 | $472 |
| Chest fluid aspiration with imaging guidance This procedure involves removing fluid from the chest cavity using imaging technology to guide the needle placement. |
70 | $97 | $289 |
| Ultrasound guidance for needle placement Use of ultrasound imaging to guide the precise placement of a needle during a medical procedure. |
52 | $25 | $107 |
| Ultrasound-guided fine needle aspiration biopsy, first lesion A biopsy procedure where a thin needle is used to collect tissue samples from a growth, guided by ultrasound imaging. This code applies to the first lesion or mass sampled during the session. |
44 | $59 | $176 |
| CT scan of abdominal and pelvic blood vessels with contrast A computed tomography scan that uses contrast dye to visualize the blood vessels in the abdomen and pelvis. |
35 | $86 | $360 |
| Central venous port insertion A surgical procedure to place a small reservoir under the skin for long-term access to the bloodstream. The device is connected to a vein to allow for repeated medication administration or blood draws. |
31 | $289 | $2,623 |
| 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. |
31 | $118 | $394 |
| Insertion of tunneled central venous catheter for infusion, age 5+ A surgical procedure to place a long-term catheter into a large vein for delivering medications or fluids. The catheter is tunneled under the skin to reduce infection risk and provide stable access for patients aged 5 and older. |
30 | $226 | $1,896 |
| Radiologist review of abdominal artery image A radiologist reviews images of the arteries in the abdomen to assess their structure and function. |
30 | $82 | $227 |
| 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. |
27 | $56 | $200 |
| Arterial catheter insertion, initial third order branch Insertion of a tube into an abdominal, pelvic, or leg artery, specifically targeting the initial third order branch. |
22 | $175 | $1,183 |
| Contrast injection through abdominal tube for X-ray A contrast dye is injected into the abdomen through a tube to enhance visibility during an X-ray study. |
22 | $29 | $307 |
| Radiologist review of abscess or sinus study A radiologist reviews the images from a study of an abscess or sinus cavity. |
22 | $21 | $89 |
| Infusion tube insertion with imaging guidance A radiologist inserts an infusion tube into the body while using imaging guidance to ensure proper placement and reviews the procedure. |
21 | $73 | $288 |
| Removal of tunneled central venous tube This procedure involves the removal of a catheter that has been surgically placed under the skin and threaded into a large vein. |
21 | $117 | $328 |
| Ultrasound-guided fine needle aspiration biopsy, each additional growth This procedure involves using ultrasound guidance to perform a fine needle aspiration biopsy on an additional growth during the same session. |
20 | $43 | $120 |
| Arterial tube insertion, additional vessels This code covers the insertion of a tube into an additional artery in the abdomen, pelvis, or leg during a procedure where other arteries have already been accessed. |
20 | $42 | $184 |
| Chest fluid drainage with tube insertion using imaging guidance This procedure removes fluid from the chest cavity and places a tube to stay in place for ongoing drainage. Imaging guidance is used to help position the tube accurately. |
16 | $116 | $589 |
| Insertion of non-tunneled central venous catheter A procedure to place a central venous catheter for infusion in patients aged 5 years or older. The catheter is inserted directly into a large vein without being tunneled under the skin. |
15 | $73 | $629 |
| Needle biopsy or removal of surface lymph nodes A procedure to obtain a tissue sample or remove lymph nodes located near the surface of the body using a needle. |
15 | $64 | $199 |
| CT-guided tissue removal A procedure using computed tomography imaging to guide the removal of tissue from the body. |
15 | $155 | $672 |
| Core needle biopsy of lung or mediastinum A procedure to remove a small tissue sample from the lung or the space between the lungs using a needle inserted through the skin. |
14 | $130 | $497 |
| Liver needle biopsy through skin A procedure in which a needle is inserted through the skin to remove a small sample of liver tissue for examination. |
14 | $76 | $796 |
| Kidney drainage tube replacement with imaging guidance A radiologist replaces a kidney drainage tube while using imaging guidance to ensure proper placement and reviews the procedure. |
14 | $106 | $583 |
| Vessel or growth occlusion with radiologist review A procedure to block blood flow to growths or obstructed vessels, including review by a radiologist. |
13 | $471 | $2,059 |
| CT scan of chest blood vessels with contrast A CT scan that uses contrast dye to create detailed images of the blood vessels in the chest. |
13 | $72 | $317 |
| Needle biopsy of abdominal cavity growth A needle is inserted into a growth within the abdominal cavity to remove a small tissue sample for laboratory analysis. |
12 | $63 | $192 |
| Kidney needle biopsy A procedure in which a needle is used to remove a small sample of kidney tissue for examination. |
12 | $85 | $533 |
| CT scan of abdominal aorta and leg arteries with contrast A CT scan that uses contrast dye to create detailed images of the abdominal aorta and the arteries in both legs. |
12 | $95 | $400 |
| Radiologist review of CT-guided needle placement A radiologist reviews the CT imaging used to guide the placement of a needle. |
12 | $60 | $239 |
| Abdominal fluid drainage by tube with imaging guidance A procedure to remove fluid from the abdominal cavity using a tube. Imaging guidance is used to direct the placement of the tube. |
11 | $165 | $1,526 |
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.
9.3% high complexity
49.6% medium
41.0% routine
Industry Payment Transparency
Open Payments through 2024 ↗$165,046
Total received (2018-2024)
Avg $23,578/year across 7 years
Top 5% in IL for vascular & interventional radiology physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
16
Companies
148
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
$9,415
2023
$54,024
2022
$4,122
2021
$22,811
2020
$26,218
2019
$19,665
2018
$28,791
Payments by company (2024)
Sirtex Medical Inc
$9,186
Boston Scientific Corporation
$101
Inari Medical, Inc.
$91
Medtronic, Inc.
$19
CORDIS US CORP.
$17
Top 3 companies account for 99.6% of 2024 payments
All-time payments by company (2018-2024) ›
Sirtex Medical Inc
$158,369
TriSalus Life Sciences, Inc.
$4,914
Medtronic Vascular, Inc.
$542
Inari Medical, Inc.
$385
Boston Scientific Corporation
$263
Penumbra, Inc.
$233
Medtronic, Inc.
$74
Terumo Medical Corporation
$57
CORDIS US CORP.
$42
Philips Electronics North America Corporation
$41
BOSTON SCIENTIFIC CORPORATION
$36
Mozarc Medical US LLC
$29
Cardinal Health 200 LLC
$17
Covidien LP
$17
Medtronic USA, Inc.
$14
BTG International, Inc.
$13
Top 3 companies account for 99.3% of all-time payments
Associated products mentioned in payments ›
(9556) IVC Filter Removal · ANGIOJET · Abre · AngioSeal · CHAMELEON · Chameleon · EKOSONIC · Emprint · FLOWTRIEVER CATHETER · GENERAL - VASCULAR INTERVENTION · General - Embolics · General - IO Ablation · HawkOne · ICEFX · IGT D Therapy · IN.PACT ADMIRAL · IN.PACT Admiral · Indigo · Indigo System · KYPHON Balloon Kyphoplasty · MVP · MYNX CONTROL · MYNX CONTROLTM · S · SIR-Spheres Microspheres · TR Band · TRINAV INFUSION SYSTEM · TheraSphere Administration Set · TheraSphere Y90 Glass Microspheres 10 GBq
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
Vascular & interventional radiology physicians in nearby ZIP areas
102
County median income
$81,797
Nearest hospital to ZIP centroid (approximate)
NORTHSHORE UNIVERSITY HEALTHSYSTEM - EVANSTON 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. Alonzo is a mixed practice specialist, with moderate Medicare volume, 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. Alonzo experienced with sedation by physician, initial 15 minutes?
Based on Medicare claims data, Dr. Alonzo performed 151 sedation by physician, initial 15 minutes 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. Alonzo receive payments from pharmaceutical companies?
Yes. Dr. Alonzo received a total of $165,046 from 16 companies across 148 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. Alonzo's costs compare to other vascular & interventional radiology physicians in Evanston?
Dr. Alonzo's average Medicare payment per service is $74. 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. Alonzo) 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 →
Explore related providers
Same specialty & city
Vascular & Interventional Radiology Physicians in Evanston
Browse vascular & interventional radiology physicians in Evanston ranked by procedure volume and transparency data.
Highest volume
Top Vascular & Interventional Radiology Physicians in IL
Vascular & interventional radiology physicians ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Vascular & Interventional Radiology Physicians in IL
Which IL vascular & interventional radiology physicians receive the most from drug and device companies.
By company
Sirtex Medical Inc Payments to Doctors
See all physicians who received payments from Sirtex Medical Inc.
By company
TriSalus Life Sciences, Inc. Payments to Doctors
See all physicians who received payments from TriSalus Life Sciences, Inc.
By company
Medtronic Vascular, Inc. Payments to Doctors
See all physicians who received payments from Medtronic Vascular, Inc.
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