Quick answers
- Which hospitals does William Petersen work at?
- Medicare's official clinician data lists William Petersen at 2 hospitals: Inova Fair Oaks Hospital and Virginia Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Petersen see patients?
- Medicare's clinician data lists 2 practice locations, including Arlington, VA and Aldie, VA. Call before your visit to confirm the address.
- What is William Petersen's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does William Petersen accept Medicare assignment?
- Yes. Medicare's clinician data says William Petersen 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 William Petersen?
- (703) 810-5215, as listed in official Medicare / NPI Registry data.
- What is William Petersen's NPI number?
- 1003250887. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Petersen works
Medicare's Facility Affiliation Data lists William Petersen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Inova Fair Oaks HospitalFairfax, VA · Acute Care Hospital · CCN 490101
- Virginia Hospital CenterArlington, VA · Acute Care Hospital · CCN 490050
Practice locations
Addresses where William Petersen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1635 N George Mason Dr, Suite 310Arlington, VA 22205 (703) 810‑5215
- 24600 Millstream Dr, Suite 380Aldie, VA 20105 (703) 810‑5241
Group practices
Medicare enrollment lists William Petersen as a member of this group (CMS data updated 2026-10-02).
- Orthovirginia Inc567 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Arlington
Clinicians with the same Medicare primary specialty in Arlington, VA — not a recommendation.
Clinician information
| Medical school | Virginia Commonwealth University, School Of Medicine |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003250887 |
| 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