Alan H. Wang, MD
Gastroenterology Physician · Naperville, IL
Alan H. Wang, MD is a gastroenterology physician with a practice address in Naperville, Illinois, and NPI 1831376359, issued on Jan 28, 2008. Check the license (Illinois 036119671, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Alan H. Wang
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 036119671 IL
Self-reported in NPPES; status is on the state search - Practice location
- 100 Spalding Dr, Naperville, IL 60540
- Phone
- (630) 717-2600
- Enumerated
- Jan 28, 2008
- Record last updated
- Aug 29, 2023
- Medicaid ID
- 036119671 IL
- Medicare enrollment
- Enrolled (PECOS I20080617000088); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 887 in Illinois → Look up another NPI →
Also registered at 100 Spalding Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shahid Ahsan, M.D.Pulmonary Disease Physician1740208180
- Rafi Ali, M.D.Gastroenterology Physician1437136454
- Fariborze Barhamand, MDHematology & Oncology Physician1093810491
- Sharon Cline, M.D.Cardiovascular Disease Physician1588750327
- Michael Coffel, FNP-BCFamily Nurse Practitioner1275795866
- Mark Daniels, M.D.Gastroenterology Physician1043215718
Verify Alan H. Wang 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 036119671Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% more Medicare Part D claims than the average gastroenterology physician in 2024
1,288 Medicare Part D claims for 512 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Pantoprazole Sodium206 claims
- Gavilyte-G167 claims
- Omeprazole146 claims
- Dicyclomine Hcl102 claims
- Famotidine101 claims
- Peg-3350 And Electrolytes80 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: $436.28
15 payments; by number, the most common kind was food and beverage; the largest payer was Aimmune Therapeutics, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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 LtdNaperville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alan H. Wang among 887 gastroenterology physician records in Illinois
Alan H. Wang, MD is one of 887 gastroenterology 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 2008, is newer than 55% of them.
- NPI issued2008 · 55% of these records are older, 39% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2002 · median 2003 among the 643 with a school on file
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Illinois
There are 887 gastroenterology physician records in Illinois.
All 887 in Illinois → Every provider in Naperville → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- James Abraham, MDNaperville, IL 605401427276732
- Rafi Ali, M.D.Naperville, IL 605401437136454
- Scott Berger, M.D.Naperville, IL 605401366483455
- Mark Daniels, M.D.Naperville, IL 605401043215718
- Marc Fallah, MDNaperville, IL 605401750356804
- Sushama Gundlapalli, M.D.Naperville, IL 605401568401529
- Donald Hoscheit, MDNaperville, IL 605401316913809
- Dinesh Jain, M.D.Naperville, IL 605401003857103
Common questions
What is Alan H. Wang, MD's NPI number?
Alan H. Wang, MD's National Provider Identifier (NPI) is 1831376359, issued on Jan 28, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Alan H. Wang, MD located?
The NPPES record lists a practice address at 100 Spalding Dr, Naperville, IL, 60540. Phone: (630) 717-2600. Providers update this record themselves, so call before visiting.
How can I verify Alan H. Wang, MD's license?
NPPES lists Illinois license number 036119671, 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 Alan H. Wang, MD prescribe under Medicare Part D?
In 2024, Alan H. Wang, MD had 1,288 Medicare Part D claims for 512 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.