Quick answers
- Which hospitals does William Mook work at?
- Medicare's official clinician data lists William Mook at 4 hospitals: Inova Fair Oaks Hospital, Reston Hospital Center, UVA Health Haymarket Medical Center and Winchester Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Mook see patients?
- Medicare's clinician data lists 1 practice location in Reston, VA. Call before your visit to confirm the address.
- What is William Mook's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does William Mook accept Medicare assignment?
- Yes. Medicare's clinician data says William Mook 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 Mook?
- (703) 810-5202, as listed in official Medicare / NPI Registry data.
- What is William Mook's NPI number?
- 1528201134. 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 Mook works
Medicare's Facility Affiliation Data lists William Mook 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
- Reston Hospital CenterReston, VA · Acute Care Hospital · CCN 490107
- UVA Health Haymarket Medical CenterHaymarket, VA · Acute Care Hospital · CCN 490144
- Winchester Medical CenterWinchester, VA · Acute Care Hospital · CCN 490005
Practice locations
Addresses where William Mook is enrolled with Medicare (CMS data updated 2026-10-02).
- 1850 Town Ctr PkwyReston, VA 20190 (703) 810‑5202
Group practices
Medicare enrollment lists William Mook 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 Reston
Clinicians with the same Medicare primary specialty in Reston, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528201134 |
| 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