Quick answers
- Which hospitals does Michael A. Grimm work at?
- Medicare's official clinician data lists Michael A. Grimm at 5 hospitals: Lewisgale Hospital Alleghany, Lewisgale Hospital Montgomery, Lewisgale Medical Center, Reston Hospital Center and Stonesprings Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael A. Grimm see patients?
- Medicare's clinician data lists 6 practice locations, including Reston, VA, Lansdowne, VA and Ashburn, VA. Call before your visit to confirm the address.
- What is Michael A. Grimm's specialty?
- Medicare lists Interventional Radiology as the primary specialty, and also Diagnostic Radiology.
- Does Michael A. Grimm accept Medicare assignment?
- Yes. Medicare's clinician data says Michael A. Grimm 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 Michael A. Grimm?
- (703) 478-0922, as listed in official Medicare / NPI Registry data.
- What is Michael A. Grimm's NPI number?
- 1447238050. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael A. Grimm works
Medicare's Facility Affiliation Data lists Michael A. Grimm at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lewisgale Hospital AlleghanyLow Moor, VA · Acute Care Hospital · CCN 490126
- Lewisgale Hospital MontgomeryBlacksburg, VA · Acute Care Hospital · CCN 490110
- Lewisgale Medical CenterSalem, VA · Acute Care Hospital · CCN 490048
- Reston Hospital CenterReston, VA · Acute Care Hospital · CCN 490107
- Stonesprings Hospital CenterDulles, VA · Acute Care Hospital · CCN 490145
Practice locations
Addresses where Michael A. Grimm is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1800 Town Ctr Dr, Suite 115Reston, VA 20190 (703) 478‑0922
- 1850 Town Ctr PkwyReston, VA 20190 (703) 478‑0922
- 19500 Sandridge Way, Suite 420Lansdowne, VA 20176 (703) 737‑6010
- 20905 Professional Plz, Suite 100Ashburn, VA 20147 (571) 223‑0230
- 24440 Stone Springs BlvdSterling, VA 20166 (703) 726‑1201
Group practices
Medicare enrollment lists Michael A. Grimm as a member of these groups (CMS data updated 2026-10-02).
- Loudoun Medical Group, PC271 clinicians in the group
- Reston Radiology Consultants, PC37 clinicians in the group
- Fair Oaks Imaging Center PC18 clinicians in the group
- Mri of Reston, LP17 clinicians in the group
- Loudoun Imaging Center/Ashburn LLC16 clinicians in the group
Specialties
- Interventional Radiologyprimary
- Diagnostic Radiologyalso
Other interventional radiologists in Reston
Clinicians with the same Medicare primary specialty in Reston, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of South Florida College Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447238050 |
| 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