Quick answers
- Which hospitals does Jonathan A. Messing work at?
- Medicare's official clinician data lists Jonathan A. Messing at 2 hospitals: Inova Fairfax Hospital and Inova Loudoun Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jonathan A. Messing see patients?
- Medicare's clinician data lists 6 practice locations, including Leesburg, VA, Falls Church, VA and Fairfax, VA. Call before your visit to confirm the address.
- What is Jonathan A. Messing's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Jonathan A. Messing accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan A. Messing 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 Jonathan A. Messing?
- (703) 771-2837, as listed in official Medicare / NPI Registry data.
- What is Jonathan A. Messing's NPI number?
- 1801176755. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jonathan A. Messing works
Medicare's Facility Affiliation Data lists Jonathan A. Messing at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Inova Fairfax HospitalFalls Church, VA · Acute Care Hospital · CCN 490063
- Inova Loudoun HospitalLeesburg, VA · Acute Care Hospital · CCN 490043
Practice locations
Addresses where Jonathan A. Messing is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 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
- 3300 Gallows RdFalls Church, VA 22042
- 3600 Joseph Siewick DrFairfax, VA 22033 (703) 391‑3600
Group practices
Medicare enrollment lists Jonathan A. Messing as a member of this group (CMS data updated 2026-10-02).
- Inova Health Care Services1,817 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Leesburg
Clinicians with the same Medicare primary specialty in Leesburg, VA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801176755 |
| 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