Quick answers
- Which hospitals does Thomas J. Gregory work at?
- Medicare's official clinician data lists Thomas J. Gregory at 2 hospitals: Mercy Medical Center Inc and University of Maryland Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas J. Gregory see patients?
- Medicare's clinician data lists 2 practice locations, including Baltimore, MD. Call before your visit to confirm the address.
- What is Thomas J. Gregory's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Thomas J. Gregory accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas J. Gregory 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 Thomas J. Gregory?
- (410) 328-6704, as listed in official Medicare / NPI Registry data.
- What is Thomas J. Gregory's NPI number?
- 1023647146. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Thomas J. Gregory works
Medicare's Facility Affiliation Data lists Thomas J. Gregory at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Medical Center IncBaltimore, MD · Acute Care Hospital · CCN 210008
- University of Maryland Medical CenterBaltimore, MD · Acute Care Hospital · CCN 210002
Practice locations
Addresses where Thomas J. Gregory is enrolled with Medicare (CMS data updated 2026-10-02).
- 22 S Green StBaltimore, MD 21201 (410) 328‑6704
- 301 Saint Paul PlBaltimore, MD 21202 (410) 332‑9000
Group practices
Medicare enrollment lists Thomas J. Gregory as a member of these groups (CMS data updated 2026-10-02).
- Shock Trauma Associates PA261 clinicians in the group
- Emergency Physicians SPPS20 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023647146 |
| 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