ELLEN CY KWAN MD
NPI 1265429815
Family Medicine in Medfield, MA
About Ellen Cy Kwan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELLEN CY KWAN MD (NPI 1265429815) is an individual family medicine provider in Medfield, Massachusetts, licensed in Massachusetts (213052) and active in the NPI registry since September 2005. She is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Hospital - Needham, and is a graduate of State University Of New York At Stony Brook, School Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
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
Ellen Cy Kwan 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 Reassignment
Medicare enrollment records show Ellen Kwan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Needham, MA 02494
- Reassigned Medicare billing, Massachusetts enrollment
- 356 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 8
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beth Israel Deaconess Hospital - Needham
Acute Care Hospitals · Needham, MABeth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAFaulkner Hospital-Brigham And Women's
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02052 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Kwan's NPI number?
The NPI number for Ellen Kwan is 1265429815. It was assigned to this individual provider in the NPPES registry on September 29, 2005.
Where is Ellen Kwan located?
Ellen Kwan practices at 50 North St, Medfield, MA 02052. The listed phone number is (508) 359-1519.
What is Ellen Kwan's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Ellen Kwan enrolled in Medicare?
Yes. Ellen Kwan 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 organization bills Medicare for Ellen Kwan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ellen Kwan reassigns Medicare benefits to Medical Care Of Boston Management Corporation (Needham, MA). The 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 Kwan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ellen Kwan accept?
Health plans from Anthem Blue Cross and Blue Shield list Ellen Kwan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Ellen Kwan affiliated with any hospitals?
According to CMS data, Ellen Kwan is affiliated with Beth Israel Deaconess Hospital - Needham, Beth Israel Deaconess Medical Center, Brigham And Women's Hospital and Faulkner Hospital-Brigham And Women's.
When was this NPI record last updated?
The NPPES record for Ellen Kwan was last updated on February 28, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Ellen Cy Kwan, MD · NPI 1265429815
Family Medicine physician in Medfield, Massachusetts. Individual provider, active in the CMS NPPES registry since September 29, 2005.
## Identity
- **NPI:** 1265429815 (Entity type: Individual)
- **Enumerated:** September 29, 2005
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 213052 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 50 NORTH ST, Medfield, MA 02052-1654
- **Phone:** (508) 359-1519 · **Fax:** (508) 359-4345
## 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:** Medical Care Of Boston Management Corporation (NPI 1437196359, Needham, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Stony Brook, School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** February 28, 2011
- **Other identifiers:** Medicare ID-Type Unspecified A34144 (MA); Medicare UPIN H72623; Medicaid 0171638 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1265429815) · Data from the CMS NPPES public registry.