Michael J. Zerega, MD
Gastroenterology Physician · Lake St Louis, MO
Michael J. Zerega, MD is a gastroenterology physician with a practice address in Lake St Louis, Missouri, and NPI 1073505178, issued on Aug 16, 2005. Check the license (Missouri 2000154596, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Michael J. Zerega
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 2000154596 MO
Self-reported in NPPES; status is on the state search - Practice location
- 200 Brevco Plz, Lake St Louis, MO 63367
- Phone
- (636) 561-9020
- Enumerated
- Aug 16, 2005
- Record last updated
- Apr 2, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (636) 561-6208
- Medicaid ID
- 1073505178 MO
- Medicare enrollment
- Enrolled (PECOS I20051215000647); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 414 in Missouri → Look up another NPI →
Also registered at 200 Brevco Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Petersen, M.D.Gastroenterology Physician1831169275
Verify Michael J. Zerega in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2000154596Check 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
1,287 Medicare Part D claims for 665 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Gavilyte-C351 claims
- Pantoprazole Sodium155 claims
- Omeprazole111 claims
- Peg 3350-Electrolyte84 claims
- Famotidine72 claims
- Gavilyte-G48 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: $48.39
2 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, 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
- Mercy Clinic Gastroenterology LLCLake St Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael J. Zerega among 414 gastroenterology physician records in Missouri
Michael J. Zerega, MD is one of 414 gastroenterology physician records with a practice address in Missouri. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1997 · median 2003 among the 303 with a school on file
- Record last updated2015 · 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 207RG0100X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 gastroenterology physician records list a practice address in Lake St Louis
They are 5 of the 264 NPPES records with a practice address in Lake St Louis, and 414 gastroenterology physician records in Missouri.
All 414 in Missouri → Every provider in Lake St Louis → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Mohhamed Omran, MDLake St Louis, MO 633671861592925
- James Petersen, M.D.Lake St Louis, MO 633671831169275
- Kamran Qureshi, MDLake St Louis, MO 633671417119926
- Joseph Rodemann, MDLake St Louis, MO 633671730101874
- Ayooluwatomiwa Adekunle, MDO Fallon, MO 633681619593779
- Eldad Bialecki, M.D.O Fallon, MO 633681003952458
- Qaiser Jawaid, M.D.O Fallon, MO 633681437110681
- Chaudhary Khan, MDO Fallon, MO 633681649252461
Common questions
What is Michael J. Zerega, MD's NPI number?
Michael J. Zerega, MD's National Provider Identifier (NPI) is 1073505178, issued on Aug 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. Zerega, MD located?
The NPPES record lists a practice address at 200 Brevco Plz, Lake St Louis, MO, 63367. Phone: (636) 561-9020. Providers update this record themselves, so call before visiting.
How can I verify Michael J. Zerega, MD's license?
NPPES lists Missouri license number 2000154596, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael J. Zerega, MD prescribe under Medicare Part D?
In 2024, Michael J. Zerega, MD had 1,287 Medicare Part D claims for 665 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.