Quick answers
- Which hospitals does Aaron J. Johnson work at?
- Medicare's official clinician data lists Aaron J. Johnson at 3 hospitals: University of Maryland Medical Center, University of MD Baltimore Washington Medical Center and University of MD Capital Region Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Aaron J. Johnson see patients?
- Medicare's clinician data lists 5 practice locations, including Hagerstown, MD, Baltimore, MD and Glen Burnie, MD. Call before your visit to confirm the address.
- What is Aaron J. Johnson's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Aaron J. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Aaron J. Johnson 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 Aaron J. Johnson?
- (410) 328-6704, as listed in official Medicare / NPI Registry data.
- What is Aaron J. Johnson's NPI number?
- 1538420641. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Aaron J. Johnson works
Medicare's Facility Affiliation Data lists Aaron J. Johnson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of Maryland Medical CenterBaltimore, MD · Acute Care Hospital · CCN 210002
- University of MD Baltimore Washington Medical CenterGlen Burnie, MD · Acute Care Hospital · CCN 210043
- University of MD Capital Region Medical CenterUpper Marlboro, MD · Acute Care Hospital · CCN 210003
Practice locations
Addresses where Aaron J. Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 11110 Medical Campus RdHagerstown, MD 21742
- 22 S Green StBaltimore, MD 21201 (410) 328‑6704
- 2200 Kernan DrBaltimore, MD 21207 (410) 328‑6704
- 2200 Kernan Dr, Suite 1154Baltimore, MD 21207
- 255 Hospital Dr, Suite 207Glen Burnie, MD 21061 (410) 553‑8170
Group practices
Medicare enrollment lists Aaron J. Johnson as a member of these groups (CMS data updated 2026-10-02).
- Meritus Medical Center Inc743 clinicians in the group
- University of Maryland Community Medical Group Inc477 clinicians in the group
- University of Maryland Orthopaedic Associates PA67 clinicians in the group
- University of Maryland Orthopaedic Trauma Associates, P.A.41 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Hagerstown
Clinicians with the same Medicare primary specialty in Hagerstown, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538420641 |
| 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