Quick answers
- Which hospitals does John Klein work at?
- Medicare's official clinician data lists John Klein at 5 hospitals: Inova Alexandria Hospital, Inova Fair Oaks Hospital, Inova Fairfax Hospital, Inova Mount Vernon Hospital and Sentara Northern Virginia Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Klein see patients?
- Medicare's clinician data lists 6 practice locations, including Alexandria, VA, Reston, VA and Woodbridge, VA. Call before your visit to confirm the address.
- What is John Klein's specialty?
- Medicare lists Urology as the primary specialty.
- Does John Klein accept Medicare assignment?
- Yes. Medicare's clinician data says John Klein 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.
- Does John Klein offer telehealth?
- Medicare's clinician data says John Klein offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John Klein?
- (703) 680-2111, as listed in official Medicare / NPI Registry data.
- What is John Klein's NPI number?
- 1184899650. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Klein works
Medicare's Facility Affiliation Data lists John Klein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Inova Alexandria HospitalAlexandria, VA · Acute Care Hospital · CCN 490040
- Inova Fair Oaks HospitalFairfax, VA · Acute Care Hospital · CCN 490101
- Inova Fairfax HospitalFalls Church, VA · Acute Care Hospital · CCN 490063
- Inova Mount Vernon HospitalAlexandria, VA · Acute Care Hospital · CCN 490122
- Sentara Northern Virginia Medical CenterWoodbridge, VA · Acute Care Hospital · CCN 490113
Practice locations
Addresses where John Klein is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1800 N Beauregard St, Suite 3Alexandria, VA 22311 (703) 680‑2111
- 1860 Town Ctr Dr, Suite 150Reston, VA 20190 (703) 480‑0220
- 2296 Opitz Blvd, Suite 350Woodbridge, VA 22191 (703) 680‑2111
- 3700 Joseph Siewick Dr, Suite 300Fairfax, VA 22033 (703) 680‑2111
- 6230 Rolling Rd, Suite IjSpringfield, VA 22152 (571) 565‑6460
Group practices
Medicare enrollment lists John Klein as a member of these groups (CMS data updated 2026-10-02).
- Inova Health Care Services1,817 clinicians in the group
- Gastrointestinal Specialists LLC81 clinicians in the group
- Potomac Urology Center, LLC16 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Alexandria
Clinicians with the same Medicare primary specialty in Alexandria, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1184899650 |
| 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