Quick answers
- Which hospitals does Kelsi E. Marler work at?
- Medicare's official clinician data lists Kelsi E. Marler at 3 hospitals: Mercy Hospital Lincoln, Mercy Hospital St Louis and Mercy Hospital Washington. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Kelsi E. Marler see patients?
- Medicare's clinician data lists 2 practice locations, including Wentzville, MO and Warrenton, MO. Call before your visit to confirm the address.
- What is Kelsi E. Marler's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Kelsi E. Marler accept Medicare assignment?
- Yes. Medicare's clinician data says Kelsi E. Marler 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 Kelsi E. Marler?
- (636) 698-6266, as listed in official Medicare / NPI Registry data.
- What is Kelsi E. Marler's NPI number?
- 1881442317. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Kelsi E. Marler works
Medicare's Facility Affiliation Data lists Kelsi E. Marler at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital LincolnTroy, MO · Critical Access Hospital · CCN 261319
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
- Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · CCN 260052
Practice locations
Addresses where Kelsi E. Marler is enrolled with Medicare (CMS data updated 2026-10-02).
- 1502 W Meyer RdWentzville, MO 63385 (636) 698‑6266
- 521 Anwijo WayWarrenton, MO 63383 (636) 456‑6103
Group practices
Medicare enrollment lists Kelsi E. Marler as a member of this group (CMS data updated 2026-10-02).
- Mercy Clinic East Communities571 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Wentzville
Clinicians with the same Medicare primary specialty in Wentzville, MO — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2024 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881442317 |
| 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