Michael Vanantwerp, MD
Emergency Medicine Physician · O Fallon, IL
Michael Vanantwerp, MD is an emergency medicine physician with a practice address in O Fallon, Illinois, and NPI 1790349033, issued on Apr 23, 2019. Check the license (Illinois 036.158946, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Michael Vanantwerp
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 036.158946 IL
4301506138 MI
Self-reported in NPPES; status is on the state search - Practice location
- 320 E Highway 50, O Fallon, IL 62269
- Phone
- (888) 577-6337
- Enumerated
- Apr 23, 2019
- Record last updated
- Jun 15, 2022
- Medicare enrollment
- Enrolled (PECOS I20220822001663); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 320 E Highway 50
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephanie Armstrong, PA-CPhysician Assistant1962700757
- Sarah Brashear, FNP-CFamily Nurse Practitioner1073499901
- Susan Drabing, FNP-BCFamily Nurse Practitioner1326345141
- Dawn Drewes, APNFamily Nurse Practitioner1700177763
- Vicky Hwang, MDEmergency Medicine Physician1205332194
- Richard Knight, MSN FNP-BCFamily Nurse Practitioner1992959282
Verify Michael Vanantwerp 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 036.158946Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average emergency medicine physician in 2024
208 Medicare Part D claims for 154 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 30 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen25 claims
- Naproxen22 claims
- Amoxicillin-Clavulanate Potass18 claims
- Ciprofloxacin Hcl15 claims
- Nitrofurantoin Mono-Macro14 claims
- Ondansetron Odt14 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 77.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
6 hospitals and group practices
- Memorial HospitalChester, IL · Acute Care Hospitals5 of 5 stars
- Midwest Emergency Anderson Health IncStaunton, IL
- Midwest Emergency Centralia Campus Associates, Inc.Centralia, IL
- Midwest Emergency Good Samaritan, IncMount Vernon, IL
- Midwest Emergency Sparta, Inc.Sparta, IL
- Touchette Regional Hospital IncCahokia Heights, IL · Acute Care Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Michael Vanantwerp among 3,291 emergency medicine physician records in Illinois
Michael Vanantwerp, 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 2019, is newer than 74% of them.
- NPI issued2019 · 74% of these records are older, 22% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2019 · median 2012 among the 1,867 with a school on file
- Record last updated2022 · 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 Michael Vanantwerp, MD's NPI number?
Michael Vanantwerp, MD's National Provider Identifier (NPI) is 1790349033, issued on Apr 23, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Michael Vanantwerp, MD located?
The NPPES record lists a practice address at 320 E Highway 50, O Fallon, IL, 62269. Phone: (888) 577-6337. Providers update this record themselves, so call before visiting.
How can I verify Michael Vanantwerp, MD's license?
NPPES lists Illinois license number 036.158946, 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 Michael Vanantwerp, MD prescribe under Medicare Part D?
In 2024, Michael Vanantwerp, MD had 208 Medicare Part D claims for 154 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Michael Vanantwerp, MD's MIPS final score?
The 2023 MIPS final score is 77.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.