David Alan Janssen, MD
David Alan Janssen, MD is an Infectious Disease in O Fallon, Missouri. Graduated from Indiana University School of Medicine in 1988, 38 years ago. Practices with Fairview Heights Medical Group SC, a 448-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois and Missouri.
- Years since qualifying
- 38
- Trained at
- Indiana University School of Medicine
- Licensed in
- IL, MO
- In the registry since
- 2006
- Specialties on file
- 3
What do these letters mean?
- MD — Doctor of Medicine
- A physician who completed allopathic medical school.
Practice location Address checks out
20 Progress Point Pkwy Ste 206O Fallon, MO 63368-2207
Phone: (636) 344-2014
Fax: (314) 747-1476
Show map & directions
Directions in Google Maps · Apple Maps · OpenStreetMap
Pin is approximate — placed at the ZIP-code centre, not the exact door.
Additional practice locations (1)
- 621 S. New Ballas Road, St. Louis, MO 63141 — (314) 251-5700
Specialties & licences
| Infectious Disease Physician (primary) | Taxonomy 207RI0200X · Licence 208810309 (MO) |
|---|---|
| Specialist | Taxonomy 174400000X · Licence 103905 (MO) |
| Infectious Disease Physician | Taxonomy 207RI0200X · Licence 036176531 (IL) |
Record details
| NPI number | 1700995339 |
|---|---|
| Entity type | Individual (Type 1) |
| Gender | Male |
| Credentials | MD |
| Sole proprietor | No |
| NPI enumerated | August 29, 2006 |
| Last updated in NPPES | October 21, 2025 |
| Certification date | October 21, 2025 |
| Mailing address | 20 Progress Point Pkwy Ste 206, O Fallon, MO 63368-2207 |
Medicare enrollment
| Medicare specialty | INFECTIOUS DISEASE |
|---|---|
| Medical school | INDIANA UNIVERSITY SCHOOL OF MEDICINE |
| Graduated | 1988 (38 years in practice) |
| Group practice | Fairview Heights Medical Group Sc — 448 clinicians |
| Accepts Medicare assignment | Yes — accepts the Medicare-approved amount |
| Practice locations | 2 on file with Medicare |