DR. MARISSA ELIZABETH BONYUN MD, MED, FRCSC
NPI 1790338341
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Baltimore, MD
About Dr. Marissa Elizabeth Bonyun Md, Med, Frcsc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARISSA ELIZABETH BONYUN MD, MED, FRCSC (NPI 1790338341) is an individual adult reconstructive orthopaedic surgery provider in Baltimore, Maryland, licensed in Ohio (35.139373) and active in the NPI registry since July 2019. She is enrolled in Medicare PECOS, is affiliated with University Of Maryland Medical Center, and is a graduate of University Of Toronto, Faculty Of Medicine (2013).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Marissa Elizabeth Bonyun Md, Med, Frcsc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Marissa Bonyun reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: University Of Maryland Orthopaedic Trauma Associates, P.A.
- 56 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Medicare enrollment name: University Of Maryland Orthopaedic Associates PA
- 45 clinicians in this Medicare group
Laurel, MD 20707
- Reassigned Medicare billing, District of Columbia enrollment
- 328 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Maryland Medical Center
Acute Care Hospitals · Baltimore, MDUniversity Of MD Capital Region Medical Center
Acute Care Hospitals · Upper Marlboro, MDUniversity Of MD Medical Center Midtown Campus
Acute Care Hospitals · Baltimore, MDOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BALTIMORE, MD 21201
BALTIMORE, MD 21201
BALTIMORE, MD 21201
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marissa Bonyun's NPI number?
The NPI number for Marissa Bonyun is 1790338341. It was assigned to this individual provider in the NPPES registry on July 23, 2019.
Where is Marissa Bonyun located?
Marissa Bonyun practices at 22 S Greene St, Baltimore, MD 21201. The listed phone number is (410) 328-6280.
What is Marissa Bonyun's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Adult Reconstructive Orthopaedic Surgery, with taxonomy code 207XS0114X.
Is Marissa Bonyun enrolled in Medicare?
Yes. Marissa Bonyun is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Marissa Bonyun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Bonyun reassigns Medicare benefits to 3 organizations: University Of Maryland Orthopaedic Trauma Associates, PA (Baltimore, MD), University Of Maryland Orthopaedic Associates P A (Baltimore, MD) and Dimensions Healthcare Associates Inc (Laurel, MD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marissa Bonyun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Marissa Bonyun affiliated with any hospitals?
According to CMS data, Marissa Bonyun is affiliated with University Of Maryland Medical Center, University Of MD Capital Region Medical Center and University Of MD Medical Center Midtown Campus.
When was this NPI record last updated?
The NPPES record for Marissa Bonyun was last updated on August 19, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Marissa Elizabeth Bonyun, MD, MED, FRCSC · NPI 1790338341
Adult Reconstructive Orthopaedic Surgery physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since July 23, 2019.
## Identity
- **NPI:** 1790338341 (Entity type: Individual)
- **Enumerated:** July 23, 2019
- **Primary specialty:** Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery · taxonomy 207XS0114X
- **State license:** 35.139373 (Ohio)
- **Sole proprietor:** No
## Practice location
- **Address:** 22 S GREENE ST, Baltimore, MD 21201-1544
- **Phone:** (410) 328-6280
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): University Of Maryland Orthopaedic Trauma Associates, PA (NPI 1497708051, Baltimore, MD); University Of Maryland Orthopaedic Associates P A (NPI 1740235274, Baltimore, MD); Dimensions Healthcare Associates Inc (NPI 1487714168, Laurel, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Toronto, Faculty Of Medicine, class of 2013
## Record status
- **NPPES last updated:** August 19, 2020
- **Other identifiers:** Other 104120
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Source: [NPI Profile](https://npiprofile.com/npi/1790338341) · Data from the CMS NPPES public registry.