Huan J. Chang
Rheumatology Physician · Chicago, IL
Huan J. Chang is a rheumatology physician with a practice address in Chicago, Illinois, and NPI 1336244870, issued on Sep 13, 2006. Check the license (Illinois 036083242, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Huan J. Chang
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 036083242 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1740 W Taylor St, Chicago, IL 60612
- Phone
- (866) 600-2273
- Enumerated
- Sep 13, 2006
- Record last updated
- Aug 31, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040930001151); accepts Medicare assignment
- Medical or professional school
- Geisel School Of Medicine At Dartmouth, 1988
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 340 in Illinois → Look up another NPI →
Also registered at 1740 W Taylor St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Francisco AbancoCertified Registered Nurse Anesthetist1255844288
- Leena Abbas, MDStudent in an Organized Health Care Education/Training Program1679376594
- Herand AbcarianColon & Rectal Surgery Physician1881792372
- Ivy AbrahamHematology & Oncology Physician1497172845
- Rohit Abraham, MD, MPH, MATPsychiatry Physician1013478932
- Ereni Abuaita, DOInternal Medicine Physician1013710961
Verify Huan J. Chang 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 036083242Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,494 Medicare Part D claims for 160 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims. 80 claims were for opioids.
Most prescribed
- Methotrexate264 claims
- Humira(Cf) Pen99 claims
- Hydroxychloroquine Sulfate95 claims
- Prednisone71 claims
- Gabapentin68 claims
- Hydrocodone-Acetaminophen65 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.
Industry payments in 2024: $57.51
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Board OF Trustees OF The University OF IllinoisChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Huan J. Chang among 340 rheumatology physician records in Illinois
Huan J. Chang 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
- Graduated1988 · median 2003 among the 244 with a school on file
- Record last updated2009 · 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 Chicago → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Shiva AramiChicago, IL 606121629173968
- Sanford Baim, M.D.Chicago, IL 606121841227311
- Joel Block, M.D.Chicago, IL 606121285659771
- John Case, M.D.Chicago, IL 606121104840123
- Sarah Everakes, M.D.Chicago, IL 606121487687299
- Paul Glickman, M.D.Chicago, IL 606121801829510
- Meenakshi Jolly, M.D.Chicago, IL 606121316970015
- Lawrence Layfer, M.D.Chicago, IL 606121235162835
Common questions
What is Huan J. Chang's NPI number?
Huan J. Chang's National Provider Identifier (NPI) is 1336244870, issued on Sep 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Huan J. Chang located?
The NPPES record lists a practice address at 1740 W Taylor St, Chicago, IL, 60612. Phone: (866) 600-2273. Providers update this record themselves, so call before visiting.
How can I verify Huan J. Chang's license?
NPPES lists Illinois license number 036083242, 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 Huan J. Chang prescribe under Medicare Part D?
In 2024, Huan J. Chang had 1,494 Medicare Part D claims for 160 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
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.