Quick answers
- Where does Mark R. Armstrong see patients?
- Medicare's clinician data lists 8 practice locations, including Waldorf, MD, Annapolis, MD and Prince Frederick, MD. Call before your visit to confirm the address.
- What is Mark R. Armstrong's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Mark R. Armstrong accept Medicare assignment?
- Yes. Medicare's clinician data says Mark R. Armstrong 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 Mark R. Armstrong?
- (410) 298-0454, as listed in official Medicare / NPI Registry data.
- What is Mark R. Armstrong's NPI number?
- 1851399729. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mark R. Armstrong is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 10400 Odonnell Pl, Suite 100Waldorf, MD 20603 (410) 298‑0454
- 122 Defense Hwy, Suite 102Annapolis, MD 21401 (410) 571‑0350
- 130 Hospital Rd, Suite Ll100Prince Frederick, MD 20678 (410) 535‑4111
- 130 Love Point Rd, Suite 105Stevensville, MD 21666 (469) 925‑2709
- 13509 Summer Hill DrPhoenix, MD 21131 (888) 601‑0943
Group practices
Medicare enrollment lists Mark R. Armstrong as a member of these groups (CMS data updated 2026-10-02).
- Maryland Imaging Network PC81 clinicians in the group
- Community Radiology Associates Inc65 clinicians in the group
- Delaware Radiology Associates PA65 clinicians in the group
- Chesapeake Open Mri L L C18 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Waldorf
Clinicians with the same Medicare primary specialty in Waldorf, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851399729 |
| 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
- 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