Quick answers
- Which hospitals does Samuel Onyewu work at?
- Medicare's official clinician data lists Samuel Onyewu at 4 hospitals: George Washington University Hospital, Mary Washington Hospital, Meritus Medical Center and Stafford Hospital, LLC. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Samuel Onyewu see patients?
- Medicare's clinician data lists 4 practice locations, including Fredericksburg, VA, Stafford, VA and Hagerstown, MD. Call before your visit to confirm the address.
- What is Samuel Onyewu's specialty?
- Medicare lists Anesthesiology as the primary specialty, and also Pain Management.
- Does Samuel Onyewu accept Medicare assignment?
- Yes. Medicare's clinician data says Samuel Onyewu 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 Samuel Onyewu?
- (540) 741-7614, as listed in official Medicare / NPI Registry data.
- What is Samuel Onyewu's NPI number?
- 1770901514. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Samuel Onyewu works
Medicare's Facility Affiliation Data lists Samuel Onyewu at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- George Washington University HospitalWashington, DC · Acute Care Hospital · CCN 090001
- Mary Washington HospitalFredericksburg, VA · Acute Care Hospital · CCN 490022
- Meritus Medical CenterHagerstown, MD · Acute Care Hospital · CCN 210001
- Stafford Hospital, LLCStafford, VA · Acute Care Hospital · CCN 490140
Practice locations
Addresses where Samuel Onyewu is enrolled with Medicare (CMS data updated 2026-10-02).
- 1001 Sam Perry BlvdFredericksburg, VA 22401 (540) 741‑7614
- 101 Hospital Ctr BlvdStafford, VA 22554 (540) 741‑4614
- 11116 Medical Campus RdHagerstown, MD 21742 (301) 790‑8000
- 900 23rd St NWWashington, DC 20037 (202) 715‑4000
Group practices
Medicare enrollment lists Samuel Onyewu as a member of these groups (CMS data updated 2026-10-02).
- Meritus Medical Center Inc743 clinicians in the group
- Medical Faculty Associates, Inc672 clinicians in the group
- Mary Washington Healthcare Specialty Services, LLC134 clinicians in the group
Specialties
- Anesthesiologyprimary
- Pain Managementalso
Other anesthesiologists in Fredericksburg
Clinicians with the same Medicare primary specialty in Fredericksburg, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770901514 |
| 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