Individual provider · Type 1 NPI

David Alan Janssen, MD

Infectious Disease Physician · O Fallon, MO

NPI number 1700995339 Active

Practice location

20 Progress Point Pkwy Ste 206
O Fallon, MO 63368-2207

Call (636) 344-2014 Map

Fax (314) 747-1476

Other practice locations

  • 621 S. New Ballas Road, Suite 70 Tower B, St. Louis, MO 63141 · (314) 251-5700

Specialties and licenses

TaxonomyCodeLicense
Infectious Disease Physician Primary 207RI0200X208810309 (MO)
Specialist 174400000X103905 (MO)
Infectious Disease Physician 207RI0200X036176531 (IL)

Infectious Disease Physician: An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

18 other providers at this address

About NPI 1700995339

David Alan Janssen, MD's National Provider Identifier is 1700995339, issued on Aug 29, 2006. The primary taxonomy on file is Infectious Disease Physician (207RI0200X), and the practice location is in O Fallon, MO. The record was last updated on Oct 21, 2025.