John C. Wuellner
Internal Medicine Physician · Alton, IL
John C. Wuellner is an internal medicine physician with a practice address in Alton, Illinois, and NPI 1558378927, issued on Aug 1, 2006. Check the license (Illinois 036061448, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John C. Wuellner
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036061448 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2 Memorial Dr, Alton, IL 62002
- Phone
- (618) 474-1723
- Enumerated
- Aug 1, 2006
- Record last updated
- Mar 29, 2024
- Fax
- (618) 462-6989
- Medicaid ID
- 0360614483 IL
- Medicare enrollment
- Enrolled (PECOS I20240705000380); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1979
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 2 Memorial Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Onome AbianduStudent in an Organized Health Care Education/Training Program1295623460
- Mark Allendorph, M.D.Gastroenterology Physician1922094002
- Sarah Claxton, DOFamily Medicine Physician1891626545
- Jessica Draus, DOFamily Medicine Physician1902649163
- Christopher Green, M.D.Internal Medicine Physician1568479939
- Christine Harlan, FNP-BCFamily Nurse Practitioner1477882454
Verify John C. Wuellner 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 036061448Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average internal medicine physician in 2024
911 Medicare Part D claims for 222 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Atorvastatin Calcium50 claims
- Losartan Potassium45 claims
- Amlodipine Besylate35 claims
- Levothyroxine Sodium33 claims
- Lisinopril33 claims
- Rosuvastatin Calcium32 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: $36.88
2 payments; by number, the most common kind was food and beverage; the largest payer was Calliditas Therapeutics US Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Salida Hospital DistrictSalida, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John C. Wuellner among 7,238 internal medicine physician records in Illinois
John C. Wuellner is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1979 · median 2003 among the 3,580 with a school on file
- Record last updated2024 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 internal medicine physician records list a practice address in Alton
They are 21 of the 1,113 NPPES records with a practice address in Alton, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Alton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- William Bartley, MDAlton, IL 620021134112097
- Edward Blair, M.D.Alton, IL 620021093821605
- Lawrence Burch, M.D.Alton, IL 620021467568089
- Colin Butterfield, M.D.Alton, IL 620021952417578
- Sarnit Charnond, M.D.Alton, IL 620021497868491
- Christopher Green, M.D.Alton, IL 620021568479939
- John Hoelscher, MDAlton, IL 620021447267810
- D'Andrienne Jones, MDAlton, IL 620021760455661
Common questions
What is John C. Wuellner's NPI number?
John C. Wuellner's National Provider Identifier (NPI) is 1558378927, issued on Aug 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John C. Wuellner located?
The NPPES record lists a practice address at 2 Memorial Dr, Alton, IL, 62002. Phone: (618) 474-1723. Providers update this record themselves, so call before visiting.
How can I verify John C. Wuellner's license?
NPPES lists Illinois license number 036061448, 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 John C. Wuellner prescribe under Medicare Part D?
In 2024, John C. Wuellner had 911 Medicare Part D claims for 222 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.