Quick answers
- Which hospitals does Timothy Guernsey work at?
- Medicare's official clinician data lists Timothy Guernsey at 4 hospitals: Barnes Jewish Hospital, HSHS St Elizabeth's Hospital, Missouri Baptist Medical Center and Parkland Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Timothy Guernsey see patients?
- Medicare's clinician data lists 2 practice locations, including O Fallon, IL and Saint Louis, MO. Call before your visit to confirm the address.
- What is Timothy Guernsey's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Timothy Guernsey accept Medicare assignment?
- Yes. Medicare's clinician data says Timothy Guernsey 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 Timothy Guernsey?
- (618) 234-2120, as listed in official Medicare / NPI Registry data.
- What is Timothy Guernsey's NPI number?
- 1063052918. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Timothy Guernsey works
Medicare's Facility Affiliation Data lists Timothy Guernsey at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · CCN 260032
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · CCN 140187
- Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · CCN 260108
- Parkland Health CenterFarmington, MO · Acute Care Hospital · CCN 260163
Practice locations
Addresses where Timothy Guernsey is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Saint Elizabeth BlvdO Fallon, IL 62269 (618) 234‑2120
- 3015 N Ballas RdSaint Louis, MO 63131 (314) 996‑5000
Group practices
Medicare enrollment lists Timothy Guernsey as a member of these groups (CMS data updated 2026-10-02).
- North American Partners in Anesthesia Illinois LLC431 clinicians in the group
- Missouri Baptist Medical Center124 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Illinois →
Other nurse anesthetists in O Fallon
Clinicians with the same Medicare primary specialty in O Fallon, IL — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063052918 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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