Bob Sun, M.D.
Rheumatology Physician · Evanston, IL
Bob Sun, M.D. is a rheumatology physician with a practice address in Evanston, Illinois, and NPI 1679657944, issued on Oct 24, 2006. Check the license (Illinois 036118325, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Bob Sun
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 036118325 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Central St Ste 800, Evanston, IL 60201
- Phone
- (847) 570-2503
- Enumerated
- Oct 24, 2006
- Record last updated
- Feb 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (847) 570-1123
- Medicare enrollment
- Enrolled (PECOS I20070713000472); accepts Medicare assignment
- Medical or professional school
- University Of Miami, Lm Miller School Of Medicine, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 340 in Illinois → Look up another NPI →
Also registered at 1000 Central St Ste 800
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Acree, M.D.Infectious Disease Physician1336378348
- Vincent Biank, MDPediatric Gastroenterology Physician1811948243
- Christina Boutsicaris, MDRheumatology Physician1063832996
- Jyoti Eknoor Brar, M.B.B.S.Nephrology Physician1609193028
- Jeffrey Brow, DORheumatology Physician1811481062
- Franco Campanella, D.O.Neurology Physician1609886332
Verify Bob Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036118325Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,959 Medicare Part D claims for 368 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 81 claims were for opioids.
Most prescribed
- Prednisone301 claims
- Methotrexate239 claims
- Hydroxychloroquine Sulfate235 claims
- Allopurinol180 claims
- Alendronate Sodium85 claims
- Colchicine68 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 93.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Endeavor Health Medical GroupEvanston, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bob Sun among 340 rheumatology physician records in Illinois
Bob Sun, M.D. is one of 340 rheumatology physician records with a practice address in Illinois. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2001 · median 2003 among the 244 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Illinois
There are 340 rheumatology physician records in Illinois.
All 340 in Illinois → Every provider in Evanston → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Christina Boutsicaris, MDEvanston, IL 602011063832996
- Jeffrey Brow, DOEvanston, IL 602011811481062
- Anjali Casey, M.D.Evanston, IL 602011457507535
- Lewis Cohen, MDEvanston, IL 602011063434231
- Sylvia Duby, M.D.Evanston, IL 602011780659227
- Joseph Golbus, M.D.Evanston, IL 602011215976410
- Ian Green, MD, MPHEvanston, IL 602011629428859
- James Grober, MDEvanston, IL 602011063434256
Common questions
What is Bob Sun, M.D.'s NPI number?
Bob Sun, M.D.'s National Provider Identifier (NPI) is 1679657944, issued on Oct 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bob Sun, M.D. located?
The NPPES record lists a practice address at 1000 Central St Ste 800, Evanston, IL, 60201. Phone: (847) 570-2503. Providers update this record themselves, so call before visiting.
How can I verify Bob Sun, M.D.'s license?
NPPES lists Illinois license number 036118325, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Bob Sun, M.D. prescribe under Medicare Part D?
In 2024, Bob Sun, M.D. had 1,959 Medicare Part D claims for 368 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Bob Sun, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.