Quick answers
- Which hospitals does Douglas D. Mayo work at?
- Medicare's official clinician data lists Douglas D. Mayo at 5 hospitals: Umd Upper Chesapeake Medical Center, University of MD Capital Region Medical Center, University of MD Charles Regional Medical Center, University of MD Shore Medical Center at Chestertown and University of MD Shore Medical Center at Easton. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Douglas D. Mayo see patients?
- Medicare's clinician data lists 1 practice location in Largo, MD. Call before your visit to confirm the address.
- What is Douglas D. Mayo's specialty?
- Medicare lists Emergency Medicine as the primary specialty, and also Internal Medicine.
- Does Douglas D. Mayo accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas D. 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 D. Mayo?
- (240) 677-1000, as listed in official Medicare / NPI Registry data.
- What is Douglas D. Mayo's NPI number?
- 1548221062. 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 D. Mayo works
Medicare's Facility Affiliation Data lists Douglas D. Mayo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Umd Upper Chesapeake Medical CenterBel Air, MD · Acute Care Hospital · CCN 210049
- University of MD Capital Region Medical CenterUpper Marlboro, MD · Acute Care Hospital · CCN 210003
- University of MD Charles Regional Medical CenterLa Plata, MD · Acute Care Hospital · CCN 210035
- University of MD Shore Medical Center at ChestertownChestertown, MD · Acute Care Hospital · CCN 210030
- University of MD Shore Medical Center at EastonEaston, MD · Acute Care Hospital · CCN 210037
Practice locations
Addresses where Douglas D. Mayo is enrolled with Medicare (CMS data updated 2026-10-02).
- 901 Harry S Truman DrLargo, MD 20774 (240) 677‑1000
Group practices
Medicare enrollment lists Douglas D. Mayo as a member of this group (CMS data updated 2026-10-02).
- Adfinitas Health at Umcap LLC52 clinicians in the group
Specialties
- Emergency Medicineprimary
- Internal Medicinealso
Other emergency medicine doctors in Largo
Clinicians with the same Medicare primary specialty in Largo, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548221062 |
| 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