Quick answers
- Which hospitals does Douglas M. Mayo work at?
- Medicare's official clinician data lists Douglas M. Mayo at 1 hospital: Mercy Hospital Lincoln. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Douglas M. Mayo see patients?
- Medicare's clinician data lists 2 practice locations, including Troy, MO and Ellisville, MO. Call before your visit to confirm the address.
- What is Douglas M. Mayo's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Douglas M. Mayo accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas M. Mayo 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 Douglas M. Mayo?
- (636) 528-6755, as listed in official Medicare / NPI Registry data.
- What is Douglas M. Mayo's NPI number?
- 1942674254. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Douglas M. Mayo works
Medicare's Facility Affiliation Data lists Douglas M. Mayo 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
Practice locations
Addresses where Douglas M. Mayo is enrolled with Medicare (CMS data updated 2026-10-02).
- 1003 E Cherry StTroy, MO 63379 (636) 528‑6755
- 233 Clarkson RdEllisville, MO 63011 (636) 256‑8644
Group practices
Medicare enrollment lists Douglas M. Mayo as a member of these groups (CMS data updated 2026-10-02).
- Emergency Physicians of St Lukes LLC61 clinicians in the group
- Mercy Hospital Lincoln32 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Troy
Clinicians with the same Medicare primary specialty in Troy, MO — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942674254 |
| 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