Medicare Enrolled
Dr. Sebouh Gueyikian, M.D.
Radiation Oncology · Evanston, IL
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Consulting-driven
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. Gueyikian 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. Gueyikian
Dr. Sebouh Gueyikian is a radiation oncology specialist in Evanston, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Gueyikian performed 1,046 Medicare services across 931 unique beneficiaries.
Between the years covered by Open Payments, Dr. Gueyikian received a total of $6,002 from 15 pharmaceutical and/or device companies across 49 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in radiation oncology. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Gueyikian 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 in practice
▲ 1,046 Medicare services
$6,002 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,046
Medicare services
Bottom 25% in IL for radiation oncology
Lower Medicare volume may reflect subspecialty focus, hospital-based work, or a higher share of non-Medicare patients.
931
Unique beneficiaries
$65
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~52 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 |
|---|---|---|---|
| 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. |
234 | $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. |
161 | $12 | $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. |
82 | $15 | $63 |
| Chest fluid aspiration with imaging guidance This procedure involves removing fluid from the chest cavity using imaging technology to guide the needle placement. |
61 | $93 | $277 |
| Abdominal fluid drainage with imaging guidance Removal of fluid from the abdominal cavity using imaging technology to guide the procedure. |
55 | $80 | $472 |
| Ultrasound guidance for needle placement Use of ultrasound imaging to guide the precise placement of a needle during a medical procedure. |
40 | $25 | $107 |
| 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. |
34 | $288 | $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 | $115 | $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. |
28 | $217 | $1,896 |
| Radiologist review of abdominal artery image A radiologist reviews images of the arteries in the abdomen to assess their structure and function. |
26 | $80 | $227 |
| 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. |
23 | $149 | $1,337 |
| Radiologist review of additional artery image A radiologist reviews an additional image of an artery. This step involves professional interpretation of the imaging data. |
23 | $39 | $115 |
| 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. |
21 | $82 | $360 |
| 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. |
20 | $59 | $176 |
| Hemodialysis circuit intervention with balloon dilation A procedure to insert a needle or tube into a hemodialysis circuit and dilate the dialysis segment using a balloon, with radiological review. |
20 | $194 | $831 |
| 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. |
18 | $72 | $796 |
| 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. |
17 | $120 | $497 |
| Injection of chemical agent into fluid collection with imaging guidance A procedure where a chemical agent is injected into a fluid collection using imaging guidance to ensure accurate placement. |
17 | $99 | $403 |
| Stomach tube insertion with fluoroscopy and contrast A tube is placed into the stomach while using live X-ray imaging and a contrast dye to guide the procedure. |
17 | $170 | $790 |
| Radiologist review of stomach or bowel tube placement A radiologist reviews medical images to confirm the correct placement of a tube in the stomach or large bowel. |
16 | $31 | $119 |
| Radiologist review of CT-guided needle placement A radiologist reviews the CT imaging used to guide the placement of a needle. |
14 | $58 | $239 |
| 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. |
13 | $71 | $288 |
| Removal of central venous port or pump A procedure to remove a central venous access device, such as a port or pump, from the body. |
13 | $165 | $462 |
| Vena cava filter insertion with radiologist review A procedure to place a filter in the vena cava to prevent blood clots from traveling to the lungs, including review by a radiologist. |
13 | $188 | $844 |
| Kidney needle biopsy A procedure in which a needle is used to remove a small sample of kidney tissue for examination. |
13 | $97 | $533 |
| 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. |
12 | $66 | $629 |
| 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. |
12 | $112 | $328 |
| 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. |
12 | $69 | $317 |
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.
7.3% high complexity
43.5% medium
49.2% routine
Industry Payment Transparency
Open Payments through 2024 ↗$6,002
Total received (2019-2024)
Avg $1,200/year across 5 years
Top 10% in IL for radiation oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
15
Companies
49
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.
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$3,731 (62.2%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$2,272 (37.8%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$2,456
2023
$2,933
2022
$525
2021
$15
2019
$74
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Cook Incorporated
$1,236
Inari Medical, Inc.
$669
Medtronic, Inc.
$183
Bard Peripheral Vascular, Inc.
$138
Mozarc Medical US LLC
$87
Janssen Pharmaceuticals, Inc
$38
CORDIS US CORP.
$38
Cook Medical LLC
$25
Baylis Medical Technologies Inc.
$25
Terumo Medical Corporation
$16
Top 3 companies account for 85.0% of 2024 payments
All-time payments by company (2019-2024) ›
Bard Peripheral Vascular, Inc.
$2,633
Cook Incorporated
$1,236
Inari Medical, Inc.
$938
Boston Scientific Corporation
$493
Medtronic, Inc.
$253
Philips Electronics North America Corporation
$120
Mozarc Medical US LLC
$87
CORDIS US CORP.
$63
Janssen Pharmaceuticals, Inc
$38
Terumo Medical Corporation
$38
Cook Medical LLC
$25
CARDIVA MEDICAL, INC.
$25
Baylis Medical Technologies Inc.
$25
GE HEALTHCARE
$15
Biosense Webster, Inc.
$14
Top 3 companies account for 80.1% of all-time payments
Associated products mentioned in payments ›
(6554) Periph Vasc Undiv · ABRE · ANGIOGUARD · AZUR CX DETACHABLE · Axios · CARDIVA VASCADE 6/7F VCS · CHAMELEON · DIREXION · ELUVIA · EkoSonic · FLOWTRIEVER CATHETER · GLIDESHEATH SLENDER · GUNTHER TULIP · General - Embolics · IN.PACT ADMIRAL · LUTONIX Drug Coated Balloon · LifeStream · MVP · MYNX CONTROL · Mynx Venous VCD · NA · OSTEOCOOL RF ABLATION SYSTEM · PALINDROME · RotarexS 6 F x 135 cm · S · TORCON NB · TheraSphere Y90 Glass Microspheres 10 GBq · Venovo · XARELTO
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 →
The majority of payments (62%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers. Total industry engagement is in the top 10% for radiation oncology in IL.
Geographic Context
Radiation oncologists within 10 mi
937
Per 100K population
18.1
County median income
$81,797
Nearest hospital
NORTHSHORE UNIVERSITY HEALTHSYSTEM - EVANSTON HOSPITAL
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 reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Gueyikian is a mixed practice specialist, with moderate Medicare volume, with consulting-driven industry engagement in the top 10% of IL peers, 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. Gueyikian experienced with sedation by physician, initial 15 minutes?
Based on Medicare claims data, Dr. Gueyikian performed 234 sedation by physician, initial 15 minutes 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. Gueyikian receive payments from pharmaceutical companies?
Yes. Dr. Gueyikian received a total of $6,002 from 15 companies across 49 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. Gueyikian's costs compare to other radiation oncologists in Evanston?
Dr. Gueyikian's average Medicare payment per service is $65. 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. Gueyikian) 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. 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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