Julia Sun, M.D.
Rheumatology Physician · Lake Forest, IL
Julia Sun, M.D. is a rheumatology physician with a practice address in Lake Forest, Illinois, and NPI 1235589912, issued on Jun 14, 2016. Check the license (Illinois 036148507, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Julia Sun
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- 036148507 IL
125.068435 IL
Self-reported in NPPES; status is on the state search - Practice location
- 800 N Westmoreland RD Ste 201, Lake Forest, IL 60045
- Phone
- (847) 388-0603
- Enumerated
- Jun 14, 2016
- Record last updated
- Sep 27, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (312) 694-1155
- Medicare enrollment
- Enrolled (PECOS I20210825003849); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 340 in Illinois → Look up another NPI →
Also registered at 800 N Westmoreland RD Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cristina Anez De Gomez, MDInternal Medicine Physician1619350410
- Theodore BosiPsychiatry Physician1881153765
- Esther Harris, LCSWClinical Social Worker1053770503
- Kathryn Kiehn, M.D.Rheumatology Physician1700834348
- Amanda Marks, PA-CPhysician Assistant1154168664
- Ronald Migalski, LCSWClinical Social Worker1518466994
Verify Julia 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 036148507Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average rheumatology physician in 2024
678 Medicare Part D claims for 163 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 83 claims were for opioids.
Most prescribed
- Prednisone104 claims
- Hydroxychloroquine Sulfate90 claims
- Methotrexate68 claims
- Allopurinol50 claims
- Tramadol Hcl37 claims
- Hydrocodone-Acetaminophen22 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): 94.1 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
- Northwestern Medical Faculty FoundationChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Julia Sun among 340 rheumatology physician records in Illinois
Julia 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 2016, is newer than 83% of them.
- NPI issued2016 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2016 · 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 Lake Forest → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Jennifer Capezio, MDLake Forest, IL 600451528023058
- Kathryn Kiehn, M.D.Lake Forest, IL 600451700834348
- Patrick Onkka, M.D.Lake Forest, IL 600451407235518
- Denise Verges, MDLake Forest, IL 600451053376681
- Ira Fenton, DOLibertyville, IL 600481477551752
- Kenneth Margules, MDLibertyville, IL 600481063403145
- Umber Ahmad, DOMcHenry, IL 600501083957153
- Jacqueline Kannan, M.D.McHenry, IL 600501588058606
Common questions
What is Julia Sun, M.D.'s NPI number?
Julia Sun, M.D.'s National Provider Identifier (NPI) is 1235589912, issued on Jun 14, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Julia Sun, M.D. located?
The NPPES record lists a practice address at 800 N Westmoreland RD Ste 201, Lake Forest, IL, 60045. Phone: (847) 388-0603. Providers update this record themselves, so call before visiting.
How can I verify Julia Sun, M.D.'s license?
NPPES lists Illinois license number 036148507, 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 Julia Sun, M.D. prescribe under Medicare Part D?
In 2024, Julia Sun, M.D. had 678 Medicare Part D claims for 163 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Julia Sun, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 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.