Quick answers
- Where does Ryan Theen see patients?
- Medicare's clinician data lists 4 practice locations, including O Fallon, IL, Ballwin, MO and Collinsville, IL. Call before your visit to confirm the address.
- What is Ryan Theen's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Ryan Theen accept Medicare assignment?
- Yes. Medicare's clinician data says Ryan Theen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Ryan Theen?
- (618) 215-5703, as listed in official Medicare / NPI Registry data.
- What is Ryan Theen's NPI number?
- 1639424716. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Ryan Theen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1103 Central Park DrO Fallon, IL 62269 (618) 215‑5703
- 13861 Manchester RdBallwin, MO 63011 (314) 961‑2255
- 400 Beltline RdCollinsville, IL 62234 (618) 215‑5703
- 9556 Manchester RdSaint Louis, MO 63119 (314) 961‑2255
Group practices
Medicare enrollment lists Ryan Theen as a member of these groups (CMS data updated 2026-10-02).
- Total Access Urgent Care PC126 clinicians in the group
- Tauc Il PC17 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in O Fallon
Clinicians with the same Medicare primary specialty in O Fallon, IL — not a recommendation.
Clinician information
| Graduation year | 2020 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639424716 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians