Winnie Nhan, DO
Endocrinology, Diabetes & Metabolism Physician · Glen Ellyn, IL
Winnie Nhan, DO is an endocrinology, diabetes & metabolism physician with a practice address in Glen Ellyn, Illinois, and NPI 1245681709, issued on Jun 27, 2016. Check the license (Illinois 036.157571, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Winnie Nhan
- Credential
- DO
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 036.157571 IL
Self-reported in NPPES; status is on the state search - Practice location
- 430 Pennsylvania Ave Ste 310, Glen Ellyn, IL 60137
- Phone
- (630) 789-4910
- Enumerated
- Jun 27, 2016
- Record last updated
- Aug 16, 2023
- Fax
- (630) 789-4911
- Medicaid ID
- 036157571 IL
- Medicare enrollment
- Enrolled (PECOS I20210806002927); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 2016
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 436 in Illinois → Look up another NPI →
Also registered at 430 Pennsylvania Ave Ste 310
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rita Herzing, M.D.Internal Medicine Physician1316103559
- Ashruta Patel, MDInternal Medicine Physician1164451696
Verify Winnie Nhan 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 036.157571Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
4,158 Medicare Part D claims for 599 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Metformin Hcl403 claims
- Glimepiride346 claims
- Levothyroxine Sodium316 claims
- Ozempic262 claims
- Jardiance260 claims
- Lantus Solostar248 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: $524.26
32 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 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
- Dupage Medical Group LtdLisle, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Winnie Nhan among 436 endocrinology, diabetes & metabolism physician records in Illinois
Winnie Nhan, DO is one of 436 endocrinology, diabetes & metabolism physician records with a practice address in Illinois. 85% 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 77% of them.
- NPI issued2016 · 77% of these records are older, 20% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2016 · median 2006 among the 295 with a school on file
- Record last updated2023 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Illinois
There are 436 endocrinology, diabetes & metabolism physician records in Illinois.
All 436 in Illinois → Every provider in Glen Ellyn → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Hafsa Amjed, M.DGlen Ellyn, IL 601371104272798
- Steven Bielski, M.D.Geneva, IL 601341144227570
- Elisa Hofmann, M.D.Geneva, IL 601341043217490
- Tiffany Karas, MDGeneva, IL 601341013993336
- Zeenat Parveen, M.D.Geneva, IL 601341912099060
- Demetra Rupp, M.D.Geneva, IL 601341518131903
- Karthik Subbu, M.D.Geneva, IL 601341760974950
- Nasrin Azad, MDHines, IL 601411831270909
Common questions
What is Winnie Nhan, DO's NPI number?
Winnie Nhan, DO's National Provider Identifier (NPI) is 1245681709, issued on Jun 27, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Winnie Nhan, DO located?
The NPPES record lists a practice address at 430 Pennsylvania Ave Ste 310, Glen Ellyn, IL, 60137. Phone: (630) 789-4910. Providers update this record themselves, so call before visiting.
How can I verify Winnie Nhan, DO's license?
NPPES lists Illinois license number 036.157571, 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 Winnie Nhan, DO prescribe under Medicare Part D?
In 2024, Winnie Nhan, DO had 4,158 Medicare Part D claims for 599 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.