Marissa Elizabeth Bonyun, MD, MED, FRCSC
Orthopedic Surgery (CMS) · Baltimore, MD
At a glance
22 S Greene St, Baltimore, MD 21201-1544
Published activity: Hip replacement · Knee replacement · Removal of tissue. View counts and coverage
NPPES record updated Aug 19, 2020. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
22 S Greene StBaltimore, MD 21201-1544
Education & affiliations
- Medical / professional school
- University Of Toronto, Faculty Of Medicine
- Graduation year
- 2013
- CMS specialties
- Orthopedic Surgery
Practice groups
- Dimensions Healthcare Associates, Inc
- University Of Maryland Orthopaedic Associates Pa
- University Of Maryland Orthopaedic Trauma Associates, P.a.
Reported hospital affiliations
- University Of Maryland Medical Center Baltimore, MD
- University Of Md Capital Region Medical Center Upper Marlboro, MD
- University Of Md Medical Center Midtown Campus Baltimore, MD
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Hip replacement | 1-10 |
| Knee replacement | 1-10 |
| Removal of tissue | 1-10 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $35.04 |
Reporting companies
| Company | Amount |
|---|---|
| KERECIS LIMITED | $35.04 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Orthopedic Surgery (CMS)
- Taxonomy code
- 207XS0114X
- Enumeration date
- Jul 23, 2019
- Record updated
- Aug 19, 2020
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD, MED, FRCSC
Reported taxonomies and licenses
207XS0114X · Primary
License reported: 35.139373 OH
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
22 S Greene StBaltimore, MD 21201-1544
- Phone
- (410) 328-6280
Mailing address
PO BOX 636256CINCINNATI, OH 452636256
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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