Quick answers
- Which hospitals does Cynthia R. Hays work at?
- Medicare's official clinician data lists Cynthia R. Hays at 1 hospital: Mercy Hospital St Louis. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Cynthia R. Hays see patients?
- Medicare's clinician data lists 5 practice locations, including Saint Louis, MO and Washington, MO. Call before your visit to confirm the address.
- What is Cynthia R. Hays's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Cynthia R. Hays accept Medicare assignment?
- Yes. Medicare's clinician data says Cynthia R. Hays 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 Cynthia R. Hays?
- (314) 525-3423, as listed in official Medicare / NPI Registry data.
- What is Cynthia R. Hays's NPI number?
- 1881908986. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Cynthia R. Hays works
Medicare's Facility Affiliation Data lists Cynthia R. Hays at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
Practice locations
Addresses where Cynthia R. Hays is enrolled with Medicare (CMS data updated 2026-10-02).
- 10010 Kennerly RdSaint Louis, MO 63128
- 10018 Kennerly RdSaint Louis, MO 63128 (314) 525‑3423
- 615 S New Ballas RdSaint Louis, MO 63141 (314) 251‑6339
- 851 E 5th St, Suite 154Washington, MO 63090 (636) 239‑8677
- 901 E 5th StWashington, MO 63090 (636) 239‑8231
Group practices
Medicare enrollment lists Cynthia R. Hays as a member of these groups (CMS data updated 2026-10-02).
- St Anthonys Physician Organization Hospitalist Services LC144 clinicians in the group
- Mercy Clinic Adult Hospitalists - St. Louis, LLC137 clinicians in the group
- Mercy Clinic Adult Hospitalists - Washington, LLC32 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Graduation year | 2005 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881908986 |
| 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