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 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
- Practice location
- 320 E Highway 50, O Fallon, IL 62269
- Phone
- (888) 577-6337
- Enumerated
- Apr 23, 2019
- Entity
- Type 1 · individual
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 RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
41% 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 355 among the 49,029 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 Medicare quality score for 2023: 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 hospital and facility affiliations
- 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 affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
21 emergency medicine physician records list a O Fallon practice address
They are 21 of the 1,077 NPPES records with a O Fallon practice address, and 3,096 emergency medicine physician records in Illinois.
All 21 in O Fallon → All 3,096 in Illinois → Every provider in O Fallon →
Other emergency medicine physician records in Illinois
- Osama Aaflaq, M.D.Carbondale, IL1083663520
- Suresh Abad, M.D.Vernon Hills, IL1639100126
- Albert Abalos, M.D.Elmhurst, IL1881983484
- Habib Abbasi, M.D.Joliet, IL1902832835
- Andrew Abbeg, D.O.Greenville, IL1548490311
- Ryan Abbott, DOChicago, IL1477243517
- Zakaria Abdulnabi, M.D.Urbana, IL1790135499
- Logan Abel, MDChicago, IL1447900592
- Claire Abramoff, MDChicago, IL1316380009
- Rachel Abrams, M.D.Chicago, IL1659786317
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?
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 355. Part D covers Medicare prescriptions only.
What is Michael Vanantwerp, MD's Medicare quality 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.