Dr. Bob Sun, M.D.
Rheumatology (Rheumatology Physician)
1000 Central St Ste 800
Evanston, IL 60201
Who else practices at this address →
Cook County includes primary care (3% of residents) and mental health (4% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- University of Miami, Lm Miller School of Medicine (2001)
- Years since graduation
- 25
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 391
Licensed in Illinois since 2007, according to the Illinois Department of Financial and Professional Regulation. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2001Medical school: University of Miami, Lm Miller School of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Rheumatology Physician primary
IL license 036118325 (first issued 2007; active) -
Internal Medicine Physician
IL license 036118325 (first issued 2007; active)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Northshore University Healthsystem - Evanston Hospital Evanston, IL
- Northwest Community Hospital 1 Arlington Heights, IL
- Swedish Hospital Chicago, IL
Medical groups
- Endeavor Health Medical Group (3,350 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 391
- Services billed
- 1,645
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 615 | 346 |
| Established patient office or other outpatient visit, 40-54 minutes | 116 | 76 |
| New patient office or other outpatient visit, 60-74 minutes | 40 | 40 |
| Aspiration and/or injection of fluid from large joint | 36 | 27 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 12 | 12 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Prednisone Other prescribers in Evanston, IL | 301 |
| Methotrexate (methotrexate sodium) Other prescribers in Evanston, IL | 239 |
| Hydroxychloroquine Sulfate Other prescribers in Evanston, IL | 235 |
| Allopurinol Other prescribers in Evanston, IL | 180 |
| Alendronate Sodium Other prescribers in Evanston, IL | 85 |
| Colchicine Other prescribers in Evanston, IL | 68 |
| Tramadol Hcl Other prescribers in Evanston, IL | 66 |
| Sulfasalazine Other prescribers in Evanston, IL | 66 |
| Humira(Cf) Pen (adalimumab) Other prescribers in Evanston, IL | 57 |
| Febuxostat Other prescribers in Evanston, IL | 47 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 2 companies reported 4 payments worth $146 in total to this clinician.
| Amgen Inc. | $125 |
|---|---|
| Vertex Pharmaceuticals Incorporated | $21.14 |
| Food and Beverage | $146 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.