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

Dr. Robert M McMahon, MD

Individual provider Gastroenterology Physician · NPI 1043309792

Dr. Robert M McMahon, MD is a Gastroenterology Physician in Saint Louis, Missouri. Practices as a sole proprietor. Licensed in Missouri.

Licensed in
MO
In the registry since
2006
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

509 Beauford Dr
Saint Louis, MO 63122-1413
Phone: (314) 492-4100
Fax: (260) 212-1858
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence R3N95 (MO)

Record details

NPI number1043309792
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 12, 2006
Last updated in NPPESOctober 2, 2024
Certification dateOctober 2, 2024

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