Quick answers
- Which hospitals does Mark P. Tanenbaum work at?
- Medicare's official clinician data lists Mark P. Tanenbaum at 5 hospitals: Inova Alexandria Hospital, Inova Fair Oaks Hospital, Inova Fairfax Hospital, Inova Loudoun Hospital and UVA Health Haymarket Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark P. Tanenbaum see patients?
- Medicare's clinician data lists 14 practice locations, including Arlington, VA, Leesburg, VA and Falls Church, VA. Call before your visit to confirm the address.
- What is Mark P. Tanenbaum's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Mark P. Tanenbaum accept Medicare assignment?
- Yes. Medicare's clinician data says Mark P. Tanenbaum 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 Mark P. Tanenbaum offer telehealth?
- Medicare's clinician data says Mark P. Tanenbaum offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark P. Tanenbaum?
- (703) 771-2837, as listed in official Medicare / NPI Registry data.
- What is Mark P. Tanenbaum's NPI number?
- 1114929247. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark P. Tanenbaum works
Medicare's Facility Affiliation Data lists Mark P. Tanenbaum 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 Loudoun HospitalLeesburg, VA · Acute Care Hospital · CCN 490043
- UVA Health Haymarket Medical CenterHaymarket, VA · Acute Care Hospital · CCN 490144
Practice locations
Addresses where Mark P. Tanenbaum is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 14; the Medicare profile lists all.
- 1005 N Glebe RdArlington, VA 22201
- 224 A Cornwall St NW, Suite 3.024Leesburg, VA 20176 (703) 771‑2837
- 224 B Cornwall NwstLeesburg, VA 20176
- 224 Cornwall St NWLeesburg, VA 20176 (703) 771‑2894
- 2901 Telestar Court, Suite 525Falls Church, VA 22042 (703) 852‑7750
Group practices
Medicare enrollment lists Mark P. Tanenbaum as a member of this group (CMS data updated 2026-10-02).
- Inova Health Care Services1,817 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Virginia →
Other cardiologists in Arlington
Clinicians with the same Medicare primary specialty in Arlington, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1114929247 |
| 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