MARGARET CHEN M.D
NPI 1659305084
Internal Medicine in Escondido, CA
About Margaret Chen M.d NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET CHEN M.D (NPI 1659305084) is an individual internal medicine provider in Escondido, California, licensed in California (A61751) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS and is a graduate of Tufts University School Of Medicine (1995).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Margaret Chen M.d 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 Margaret Chen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Escondido, CA 92025
- Reassigned Medicare billing, California enrollment
- 332 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92025 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 5
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 20
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 Margaret Chen's NPI number?
The NPI number for Margaret Chen is 1659305084. It was assigned to this individual provider in the NPPES registry on July 10, 2006.
Where is Margaret Chen located?
Margaret Chen practices at 460 N Elm St, Escondido, CA 92025. The listed phone number is (760) 737-2000.
What is Margaret Chen's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Margaret Chen enrolled in Medicare?
Yes. Margaret Chen 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 Margaret Chen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Chen reassigns Medicare benefits to Neighborhood Healthcare (Escondido, CA). 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 Margaret Chen'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 Margaret Chen was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Margaret Chen, M.D · NPI 1659305084
Internal Medicine physician in Escondido, California. Individual provider, active in the CMS NPPES registry since July 10, 2006.
## Identity
- **NPI:** 1659305084 (Entity type: Individual)
- **Enumerated:** July 10, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A61751 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 460 N ELM ST, Escondido, CA 92025-3002
- **Phone:** (760) 737-2000 · **Fax:** (760) 737-2039
## 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:** Neighborhood Healthcare (NPI 1598703647, Escondido, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 1995
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN H29118 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1659305084) · Data from the CMS NPPES public registry.