ELIZABETH OBRIEN MD
NPI 1922454560
Emergency Medicine in Weymouth, MA
About Elizabeth Obrien Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELIZABETH OBRIEN MD (NPI 1922454560) is an individual emergency medicine provider in Weymouth, Massachusetts, licensed in Massachusetts (283565) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS, is affiliated with South Shore Hospital, and maintains a secondary practice location in Boston.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Elizabeth Obrien Md 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
2Medicare enrollment records show Elizabeth Obrien reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Weymouth, MA 02190
- Reassigned Medicare billing, Massachusetts enrollment
- 671 clinicians in this Medicare group
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 1,358 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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
South Shore Hospital
Acute Care Hospitals · South Weymouth, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02190 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.
WEYMOUTH, MA 02190
SOUTH WEYMOUTH, MA 02190
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 Elizabeth Obrien's NPI number?
The NPI number for Elizabeth Obrien is 1922454560. It was assigned to this individual provider in the NPPES registry on May 12, 2016.
Where is Elizabeth Obrien located?
Elizabeth Obrien practices at 55 Fogg Rd, Weymouth, MA 02190. The listed phone number is (781) 624-8000.
What is Elizabeth Obrien's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Elizabeth Obrien enrolled in Medicare?
Yes. Elizabeth Obrien 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 Elizabeth Obrien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth Obrien reassigns Medicare benefits to 2 organizations: Coastal Medical Associates (Weymouth, MA) and Children's Hospital Pediatric Associates, Inc (Boston, 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 Elizabeth Obrien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Elizabeth Obrien affiliated with any hospitals?
According to CMS data, Elizabeth Obrien is affiliated with South Shore Hospital.
When was this NPI record last updated?
The NPPES record for Elizabeth Obrien was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Elizabeth Obrien, MD · NPI 1922454560
Emergency Medicine physician in Weymouth, Massachusetts. Individual provider, active in the CMS NPPES registry since May 12, 2016.
## Identity
- **NPI:** 1922454560 (Entity type: Individual)
- **Enumerated:** May 12, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 283565 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FOGG RD, Weymouth, MA 02190-2432
- **Phone:** (781) 624-8000
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Coastal Medical Associates (NPI 1932175684, Weymouth, MA); Children's Hospital Pediatric Associates, Inc (NPI 1457306664, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Yale University School Of Medicine, class of 2016
## Record status
- **NPPES last updated:** April 15, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1922454560) · Data from the CMS NPPES public registry.