Providers
12
Locations
1
Specialties
2
Insurance Plans
8
About Mercy Hospital Jefferson
Background and practice information
Mercy Hospital Jefferson is a mid-sized group medical practice based in Festus, MO, with 12 affiliated healthcare providers.
The practice brings together providers across several specialties, including emergency medicine, and nurse practitioner. Its providers are in-network with 8 insurance plans, though coverage varies by individual provider and should be confirmed before scheduling.
Practice Locations
1 location
Mercy Hospital JeffersonPrimary
1400 US HWY 61, Festus, MO 630284100
(636) 933-1111
Affiliations
Hospitals where providers at Mercy Hospital Jefferson hold admitting privileges
Insurance Networks
Accepted insurance plans and networks
Mercy Hospital Jefferson accepts 45 plans from 6 insurers, including Cigna, UnitedHealthcare, Aetna.
Source: CMS Transparency in Coverage filings (March 2026). Network participation may change — verify with the provider's office before scheduling.
Specialties at Mercy Hospital Jefferson
Provider specialties represented at this practice
Healthcare Providers
12 providers practice here
Tyler Adams, DO
Emergency Medicine
Festus, MO
Sean Lamb, MD
Emergency Medicine
Festus, MO
Nicholas Littman, MD
Emergency Medicine
Festus, MO
Nicole Messenger, MD
Emergency Medicine
Festus, MO
Joshua Nast, DO
Emergency Medicine
Festus, MO
Michael Pajor, MD
Emergency Medicine
Festus, MO
Alexander Parker, MD
Emergency Medicine
Festus, MO
Vivian Pham, MD
Emergency Medicine
Festus, MO
Jeffrey Ruggeri, MD
Emergency Medicine
Festus, MO
Bryan Vahey, DO
Emergency Medicine
Festus, MO
Gavin Flentge, NP
Nurse Practitioner
Festus, MO
Debra Gremminger, NP
Nurse Practitioner
Festus, MO
Frequently Asked Questions
Common questions about Mercy Hospital Jefferson
How many providers are at Mercy Hospital Jefferson?
Mercy Hospital Jefferson has 12 affiliated healthcare providers. You can browse the full provider roster, with specialties and locations, on this page.
What specialties does Mercy Hospital Jefferson offer?
The practice includes providers in emergency medicine, and nurse practitioner. Use the specialty filter on the provider list to find a specific type of provider.
What insurance does Mercy Hospital Jefferson accept?
Providers at Mercy Hospital Jefferson are collectively in-network with 8 insurance plans. Acceptance varies by individual provider, so confirm your specific plan with the office before your visit.
Where is Mercy Hospital Jefferson located?
Mercy Hospital Jefferson's primary location is in Festus, MO. See the contact section for the full address and phone number.
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