Quick answers
- Does Sebouh A. Gueyikian accept Medicare assignment?
- Yes. Medicare's clinician data says Sebouh A. Gueyikian accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Sebouh A. Gueyikian see?
- In 2024, CMS data shows 680 Original Medicare patients and 1,736 services for Sebouh A. Gueyikian. This counts Original Medicare only and measures volume, not quality.
- What is Sebouh A. Gueyikian's NPI number?
- 1316947062. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Sebouh A. Gueyikian, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 680 |
|---|---|
| Services billed to Medicare | 1,736 |
| Different services or procedures | 161 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)221 services
- Ultrasonic guidance for blood vessel access (76937)178 services
- Fluoroscopic guidance for insertion or removal of central vein access device (77001)102 services
- Ct scan of blood vessels of abdomen and pelvis with contrast (74174)79 services
- Aspiration of fluid from chest cavity using imaging guidance (32555)58 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Chronic kidney disease48%
- Ischemic heart disease45%
- Heart failure41%
Hospitals where Sebouh A. Gueyikian works
Medicare's Facility Affiliation Data lists Sebouh A. Gueyikian at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Carle Foundation HospitalUrbana, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140091
- Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140010
- Swedish HospitalChicago, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140114
- The University of Chicago Medical CenterChicago, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140088
Practice locations
Addresses where Sebouh A. Gueyikian is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 1300 Oak AveEvanston, IL 60201 (847) 869‑1300
- 2100 Pfingsten RdGlenview, IL 60026
- 2650 Ridge AveEvanston, IL 60201
- 611 W Park StUrbana, IL 61801 (888) 712‑2753
- 767 Park Ave W, Suite 110Highland Park, IL 60035 (847) 926‑6810
Group practices
Medicare enrollment lists Sebouh A. Gueyikian as a member of these groups (CMS data updated October 2, 2026).
- Endeavor Health Medical Group3,350 clinicians in the group
- Carle Health Care Incorporated1,666 clinicians in the group
Specialties
- Interventional Radiologyprimary
- Diagnostic Radiologyalso
Other interventional radiologists in Evanston
Clinicians with the same Medicare primary specialty in Evanston, IL — not a recommendation.
Other clinicians in Endeavor Health Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316947062 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians