William Petersen, M.D., M.P.H.
William Petersen, M.D., M.P.H. is an Orthopaedic Surgery Physician in Arlington, VA, registered under NPI 1003250887. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Arlington, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 637 ft away at Parking Garage E Patient Entrance. The nearest transit stop is 364 ft away, served by N George Mason Dr at Virginia Hospital Ctr. If you arrive early, there is a coffee shop 403 ft away.
Getting here and what is nearby
Parking 171 ft ~1 min
Parking 228 ft ~1 min
Transit N George Mason Dr at Virginia Hospital Ctr 247 ft ~1 min
Transit N George Mason Dr 267 ft ~2 min
Transit N George Mason Dr at Virginia Hospital Ctr 364 ft ~2 min
Coffee Starbucks 403 ft ~2 min
Parking Parking Garage E Patient Entrance 637 ft ~3 min
1800 North Edison Street, Arlington 22207
Convenience 7-Eleven 0.49 mi ~10 min
Restaurant McDonald's 0.50 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 0101266295 | VA | Orthopaedic Surgery Physician primary |
This provider holds licence 0101266295 issued in VA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Orthopedic Surgery
- PAC ID
- 1759689300
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| District of Columbia | I20190826000868 | Practitioner - Orthopedic Surgery |
| Virginia | I20200831000264 | Practitioner - Orthopedic Surgery |
Medicare enrolment is recorded as approved under the provider type Practitioner - Orthopedic Surgery. There are 2 separate enrolment records across 2 states (DC, VA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Orthopaedic Surgery covers
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system. NUCC Health Care Provider Taxonomy, code 207X00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — | |
| 207X00000X | Orthopaedic Surgery Physician | 0101266295 | VA | primary |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003250887 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 23, 2013 |
| Last updated | Oct 26, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | M.D., M.P.H. |
| Practice address |
1635 N GEORGE MASON DR STE 310 Arlington, VA 22205 (703) 810-5215 Fax (703) 810-5428 |
| Mailing address |
PO BOX 75868 Baltimore, MD 21275 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 2 | 5 | 0 | 8 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 5 | 0 | 8 | 7 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.