MARGARET-ELLEN JOHNSON MD
NPI 1932849502
Emergency Medicine in Silver Spring, MD
About Margaret-ellen Johnson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET-ELLEN JOHNSON MD (NPI 1932849502) is an individual emergency medicine provider in Silver Spring, Maryland, licensed in Maryland (D0103993) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS, is affiliated with Adventist Healthcare White Oak Medical Center, and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Margaret-ellen Johnson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Margaret-ellen Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rockville, MD 20850
- Reassigned Medicare billing, District of Columbia enrollment
- 251 clinicians in this Medicare group
Falls Church, VA 22042
- Reassigned Medicare billing, Maryland enrollment
- 729 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Adventist Healthcare White Oak Medical Center
Acute Care Hospitals · Silver Spring, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20904 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
SILVER SPRING, MD 20904
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 Margaret-ellen Johnson's NPI number?
The NPI number for Margaret-ellen Johnson is 1932849502. It was assigned to this individual provider in the NPPES registry on March 31, 2022.
Where is Margaret-ellen Johnson located?
Margaret-ellen Johnson practices at 11890 Healing Way, Silver Spring, MD 20904. The listed phone number is (240) 637-4000.
What is Margaret-ellen Johnson's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Margaret-ellen Johnson enrolled in Medicare?
Yes. Margaret-ellen Johnson is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Margaret-ellen Johnson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret-ellen Johnson reassigns Medicare benefits to 2 organizations: Mep Health, LLC (Rockville, MD) and Emergency Medicine Associates P.A., P.C. (Falls Church, VA). 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 Margaret-ellen Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Margaret-ellen Johnson affiliated with any hospitals?
According to CMS data, Margaret-ellen Johnson is affiliated with Adventist Healthcare White Oak Medical Center.
When was this NPI record last updated?
The NPPES record for Margaret-ellen Johnson was last updated on July 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months 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.
# Margaret-Ellen Johnson, MD · NPI 1932849502
Emergency Medicine physician in Silver Spring, Maryland. Individual provider, active in the CMS NPPES registry since March 31, 2022.
## Identity
- **NPI:** 1932849502 (Entity type: Individual)
- **Enumerated:** March 31, 2022
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** D0103993 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 11890 HEALING WAY, Silver Spring, MD 20904-7917
- **Phone:** (240) 637-4000
## 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): Mep Health, LLC (NPI 1164483558, Rockville, MD); Emergency Medicine Associates P.A., P.C. (NPI 1134117393, Falls Church, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** July 21, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1932849502) · Data from the CMS NPPES public registry.