SYDNEY MULQUEEN MD
NPI 1851087597
Emergency Medicine in Boston, MA
About Sydney Mulqueen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SYDNEY MULQUEEN MD (NPI 1851087597) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (1026136) and active in the NPI registry since April 2023. She is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Hospital Plymouth, and is a graduate of Other (2026).
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 and accepts Medicare assignment
Sydney Mulqueen 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 Sydney Mulqueen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,006 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beth Israel Deaconess Hospital Plymouth
Acute Care Hospitals · Plymouth, MASouthcoast Hospitals Group
Acute Care Hospitals · Fall River, MABeth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02215 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.
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
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 Sydney Mulqueen's NPI number?
The NPI number for Sydney Mulqueen is 1851087597. It was assigned to this individual provider in the NPPES registry on April 14, 2023.
Where is Sydney Mulqueen located?
Sydney Mulqueen practices at 330 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 667-7000.
What is Sydney Mulqueen's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Sydney Mulqueen enrolled in Medicare?
Yes. Sydney Mulqueen 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 Sydney Mulqueen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sydney Mulqueen reassigns Medicare benefits to 2 organizations: Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA) and Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr 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 Sydney Mulqueen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Sydney Mulqueen affiliated with any hospitals?
According to CMS data, Sydney Mulqueen is affiliated with Beth Israel Deaconess Hospital Plymouth, Southcoast Hospitals Group and Beth Israel Deaconess Medical Center.
When was this NPI record last updated?
The NPPES record for Sydney Mulqueen was last updated on May 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Sydney Mulqueen, MD · NPI 1851087597
Emergency Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 14, 2023.
## Identity
- **NPI:** 1851087597 (Entity type: Individual)
- **Enumerated:** April 14, 2023
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 1026136 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 BROOKLINE AVE, Boston, MA 02215-5491
- **Phone:** (617) 667-7000
## 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): Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1861216038, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2026
## Record status
- **NPPES last updated:** May 25, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1851087597) · Data from the CMS NPPES public registry.