Robert McMahon MD office can be reached during normal business hours by phone.  Leave a message.   If you have a medical emergency, please dial 911.

If you have questions about our services, accepted forms of insurance, our facility, or our physicians, please feel free to contact us during normal business hours by phone.  Dr. McMahon uses a billing service that can answer billing, collection and insurance questions as well.

Colonoscopy Doctor - Endoscopy Doctor


Office Hours By Appointment Only

​Practice closed to new patients

Call Us:  1 (314) 492-4100


(314) 492-4100

Robert McMahon MD 

Robert McMahon MD in St Louis

Colonoscopy Doctor

​Endoscopy (EGD) Doctor

Robert McMahon MD

1610 Des Peres Rd Ste 150

St Louis MO 63131