MARGUERITE S WIDENER LCSW
NPI 1508959594
Social Worker - Clinical in San Marcos, CA
About Marguerite S Widener Lcsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGUERITE S WIDENER LCSW (NPI 1508959594) is an individual clinical provider in San Marcos, California, licensed in California (73336) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
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
Marguerite S Widener Lcsw 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 Marguerite Widener reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Diego, CA 92110
- Reassigned Medicare billing, California enrollment
- 147 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
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 92078 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN MARCOS, CA 92078
SAN MARCOS, CA 92078
SAN MARCOS, CA 92078
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 Marguerite Widener's NPI number?
The NPI number for Marguerite Widener is 1508959594. It was assigned to this individual provider in the NPPES registry on October 2, 2006. The provider is also known as Peggy Widener Lcsw.
Where is Marguerite Widener located?
Marguerite Widener practices at 1582 W San Marcos Blvd Ste 105, San Marcos, CA 92078. The listed phone number is (760) 522-0710.
What is Marguerite Widener's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Marguerite Widener enrolled in Medicare?
Yes. Marguerite Widener 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 Marguerite Widener's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marguerite Widener reassigns Medicare benefits to Community Research Foundation Inc (San Diego, 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 Marguerite Widener's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marguerite Widener accept?
Health plans from Oscar Health Plan of North Carolina, Inc and UnitedHealthcare list Marguerite Widener 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.
When was this NPI record last updated?
The NPPES record for Marguerite Widener was last updated on August 2, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Marguerite S Widener, LCSW · NPI 1508959594
Clinical provider in San Marcos, California. Individual provider, active in the CMS NPPES registry since October 2, 2006.
## Identity
- **NPI:** 1508959594 (Entity type: Individual)
- **Enumerated:** October 2, 2006
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** 73336 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1582 W SAN MARCOS BLVD STE 105, San Marcos, CA 92078
- **Phone:** (760) 522-0710
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Community Research Foundation Inc (NPI 1952328700, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** August 2, 2018
- **Other identifiers:** Medicaid 6106520 (NC)
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Source: [NPI Profile](https://npiprofile.com/npi/1508959594) · Data from the CMS NPPES public registry.