Quick answers
- Which hospitals does Marissa Bonyun work at?
- Medicare's official clinician data lists Marissa Bonyun at 3 hospitals: University of Maryland Medical Center, University of MD Capital Region Medical Center and University of MD Medical Center Midtown Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marissa Bonyun see patients?
- Medicare's clinician data lists 2 practice locations, including Baltimore, MD and Upper Marlboro, MD. Call before your visit to confirm the address.
- What is Marissa Bonyun's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Marissa Bonyun accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa Bonyun 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 Marissa Bonyun?
- (410) 328-6704, as listed in official Medicare / NPI Registry data.
- What is Marissa Bonyun's NPI number?
- 1790338341. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marissa Bonyun works
Medicare's Facility Affiliation Data lists Marissa Bonyun 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 Capital Region Medical CenterUpper Marlboro, MD · Acute Care Hospital · CCN 210003
- University of MD Medical Center Midtown CampusBaltimore, MD · Acute Care Hospital · CCN 210038
Practice locations
Addresses where Marissa Bonyun is enrolled with Medicare (CMS data updated 2026-10-02).
- 22 S Green StBaltimore, MD 21201 (410) 328‑6704
- 901 Harry S Truman Dr NUpper Marlboro, MD 20774 (240) 677‑3000
Group practices
Medicare enrollment lists Marissa Bonyun as a member of these groups (CMS data updated 2026-10-02).
- Dimensions Healthcare Associates, Inc199 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 Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Toronto, Faculty Of Medicine |
| Graduation year | 2013 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790338341 |
| 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