Alex Nicholas Mueller, MD
Emergency Medicine Physician · O Fallon, IL
Alex Nicholas Mueller, MD is an emergency medicine physician with a practice address in O Fallon, Illinois, and NPI 1235711938, issued on Apr 22, 2021. Check the license (Illinois 036.180166, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Alex Nicholas Mueller
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 036.180166 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1 Saint Elizabeth Blvd, O Fallon, IL 62269
- Phone
- (618) 234-2120
- Enumerated
- Apr 22, 2021
- Record last updated
- Jul 28, 2026
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 1 Saint Elizabeth Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Caitlin AlonzoNurse Practitioner1083576243
- Justin Baecht, CRNACertified Registered Nurse Anesthetist1801034491
- Leah Baecht, DNP, CRNA, APRNCertified Registered Nurse Anesthetist1275831273
- Gregory Bray-Stanley, MDAnesthesiology Physician1902836679
- Gage Buness, DOFamily Medicine Physician1881449635
- Amanda BurgesenCertified Registered Nurse Anesthetist1568084903
Verify Alex Nicholas Mueller 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 036.180166Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average emergency medicine physician in 2024
181 Medicare Part D claims for 106 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Ibuprofen39 claims
- Methocarbamol15 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: $71.71
1 payment: food and beverage; the largest payer was Terumo Medical Corporation. The 12,335 providers of this specialty with any payment received $953.79 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.
Alex Nicholas Mueller among 3,291 emergency medicine physician records in Illinois
Alex Nicholas Mueller, MD is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 82% of them.
- NPI issued2021 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2026 · 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 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 emergency medicine physician records list a practice address in O Fallon
They are 22 of the 1,077 NPPES records with a practice address in O Fallon, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in O Fallon → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Salvador ChavezO Fallon, IL 622691548365729
- Kevin CorriganO Fallon, IL 622691841385531
- Faron Fox, M.D.O Fallon, IL 622691215968649
- Maria GalanosO Fallon, IL 622691073609814
- Gregory LawsonO Fallon, IL 622691639275977
- Brian LitlandO Fallon, IL 622691225129968
- Dale Long, D.OO Fallon, IL 622691275567612
- Armand Miranda, D.O.O Fallon, IL 622691780618074
Common questions
What is Alex Nicholas Mueller, MD's NPI number?
Alex Nicholas Mueller, MD's National Provider Identifier (NPI) is 1235711938, issued on Apr 22, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Alex Nicholas Mueller, MD located?
The NPPES record lists a practice address at 1 Saint Elizabeth Blvd, O Fallon, IL, 62269. Phone: (618) 234-2120. Providers update this record themselves, so call before visiting.
How can I verify Alex Nicholas Mueller, MD's license?
NPPES lists Illinois license number 036.180166, 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 Alex Nicholas Mueller, MD prescribe under Medicare Part D?
In 2024, Alex Nicholas Mueller, MD had 181 Medicare Part D claims for 106 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.