Quick answers
- Which hospitals does Thomas Mastri work at?
- Medicare's official clinician data lists Thomas Mastri at 2 hospitals: Mary Washington Hospital and Stafford Hospital, LLC. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas Mastri see patients?
- Medicare's clinician data lists 1 practice location in Fredericksburg, VA. Call before your visit to confirm the address.
- What is Thomas Mastri's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Thomas Mastri accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas Mastri 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 Mastri?
- (540) 371-9696, as listed in official Medicare / NPI Registry data.
- What is Thomas Mastri's NPI number?
- 1073566642. 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 Mastri works
Medicare's Facility Affiliation Data lists Thomas Mastri at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mary Washington HospitalFredericksburg, VA · Acute Care Hospital · CCN 490022
- Stafford Hospital, LLCStafford, VA · Acute Care Hospital · CCN 490140
Practice locations
Addresses where Thomas Mastri is enrolled with Medicare (CMS data updated 2026-10-02).
- 2601 Fall Hill AveFredericksburg, VA 22401 (540) 371‑9696
Group practices
Medicare enrollment lists Thomas Mastri as a member of this group (CMS data updated 2026-10-02).
- Fall Hill Gastroenterology Associates, Ltd.5 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Fredericksburg
Clinicians with the same Medicare primary specialty in Fredericksburg, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073566642 |
| 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