Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Michael J Zerega, MD

Individual provider Gastroenterology Physician · NPI 1073505178

Michael J Zerega, MD is a Gastroenterology in Lake St Louis, Missouri. Graduated from Washington University School of Medicine in 1997, 29 years ago. Practices with Mercy Clinic Gastroenterology LLC, a 65-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
29
Trained at
Washington University School of Medicine
Licensed in
MO
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

200 Brevco Plz Ste 208
Lake St Louis, MO 63367-2949
Phone: (636) 561-9020
Fax: (636) 561-6208
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 2000154596 (MO)

Record details

NPI number1073505178
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 16, 2005
Last updated in NPPESApril 2, 2015

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice Mercy Clinic Gastroenterology Llc — 65 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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