MARCELLA ISABEL MUYSSON MD
NPI 1538797998
Hospitalist in Portland, OR
About Marcella Isabel Muysson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARCELLA ISABEL MUYSSON MD (NPI 1538797998) is an individual hospitalist provider in Portland, Oregon, licensed in Oregon (MD215309) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Marcella Isabel Muysson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Marcella Muysson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97216
- Reassigned Medicare billing, Oregon enrollment
- 331 clinicians in this Medicare group
Milwaukie, OR 97222
- Reassigned Medicare billing, Oregon enrollment
- 229 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 5
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97216 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTLAND, OR 97216
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 Marcella Muysson's NPI number?
The NPI number for Marcella Muysson is 1538797998. It was assigned to this individual provider in the NPPES registry on March 31, 2020.
Where is Marcella Muysson located?
Marcella Muysson practices at 10123 SE Market St, Portland, OR 97216. The listed phone number is (503) 261-6985.
What is Marcella Muysson's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Marcella Muysson enrolled in Medicare?
Yes. Marcella Muysson is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Marcella Muysson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marcella Muysson reassigns Medicare benefits to 2 organizations: Portland Adventist Medical Center (Portland, OR) and Providence Health & Services Oregon (Milwaukie, OR). 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 Marcella Muysson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Marcella Muysson was last updated on November 6, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Marcella Isabel Muysson, MD · NPI 1538797998
Hospitalist physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since March 31, 2020.
## Identity
- **NPI:** 1538797998 (Entity type: Individual)
- **Enumerated:** March 31, 2020
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** MD215309 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 10123 SE MARKET ST, Portland, OR 97216-2532
- **Phone:** (503) 261-6985
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Portland Adventist Medical Center (NPI 1437925310, Portland, OR); Providence Health & Services Oregon (NPI 1366536963, Milwaukie, OR) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 6, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1538797998) · Data from the CMS NPPES public registry.