DR. ELLEN HSU-HUNG M.D.
NPI 1992907505
Emergency Medicine in Concord, MA
About Dr. Ellen Hsu-hung M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ELLEN HSU-HUNG M.D. (NPI 1992907505) is an individual emergency medicine provider in Concord, Massachusetts, licensed in Massachusetts (248897) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS.
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)
Dr. Ellen Hsu-hung M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Ellen Hsu-hung reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Concord, MA 01742
- Reassigned Medicare billing, Massachusetts enrollment
- 35 clinicians in this Medicare group
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- Medicare enrollment name: Newton Wellesley Emergency Medicine Specialist PC
- 46 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 4
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 01742 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.
CONCORD, MA 01742
CONCORD, MA 01742
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 Ellen Hsu-hung's NPI number?
The NPI number for Ellen Hsu-hung is 1992907505. It was assigned to this individual provider in the NPPES registry on June 5, 2007.
Where is Ellen Hsu-hung located?
Ellen Hsu-hung practices at 133 Old Road To 9 Acre Cor, Concord, MA 01742. The listed phone number is (978) 287-3694.
What is Ellen Hsu-hung's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Ellen Hsu-hung enrolled in Medicare?
Yes. Ellen Hsu-hung is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ellen Hsu-hung's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ellen Hsu-hung reassigns Medicare benefits to 2 organizations: Emerson Emergency Physicians LLC (Concord, MA) and Newton Wellesley Emergency Medicine Specialist, P .C. (Newton, MA). 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 Ellen Hsu-hung'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 Ellen Hsu-hung was last updated on August 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dr. Ellen Hsu-Hung, M.D. · NPI 1992907505
Emergency Medicine physician in Concord, Massachusetts. Individual provider, active in the CMS NPPES registry since June 5, 2007.
## Identity
- **NPI:** 1992907505 (Entity type: Individual)
- **Enumerated:** June 5, 2007
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 248897 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 133 OLD ROAD TO 9 ACRE COR, Concord, MA 01742-4159
- **Phone:** (978) 287-3694
## 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): Emerson Emergency Physicians LLC (NPI 1972742542, Concord, MA); Newton Wellesley Emergency Medicine Specialist, P .C. (NPI 1346355526, Newton, MA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 28, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1992907505) · Data from the CMS NPPES public registry.