SHEILALYN SOLIS WILLIAMS LCSW
NPI 1134561905
Social Worker - Clinical in Stanford, CA
About Sheilalyn Solis Williams Lcsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SHEILALYN SOLIS WILLIAMS LCSW (NPI 1134561905) is an individual clinical provider in Stanford, California, licensed in California (100586) and active in the NPI registry since July 2013. She is enrolled in Medicare PECOS, maintains a secondary practice location in Stanford, and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses 3
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 (PECOS)
Sheilalyn Solis Williams Lcsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Sheilalyn Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 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 94305 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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 Sheilalyn Williams's NPI number?
The NPI number for Sheilalyn Williams is 1134561905. It was assigned to this individual provider in the NPPES registry on July 22, 2013.
Where is Sheilalyn Williams located?
Sheilalyn Williams practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Sheilalyn Williams's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Sheilalyn Williams enrolled in Medicare?
Yes. Sheilalyn Williams is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Sheilalyn Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sheilalyn Williams reassigns Medicare benefits to Stanford Health Care (Stanford, 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 Sheilalyn Williams'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 Sheilalyn Williams was last updated on September 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 53 days 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.
# Sheilalyn Solis Williams, LCSW · NPI 1134561905
Clinical provider in Stanford, California. Individual provider, active in the CMS NPPES registry since July 22, 2013.
## Identity
- **NPI:** 1134561905 (Entity type: Individual)
- **Enumerated:** July 22, 2013
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** 100586 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Stanford Health Care (NPI 1437292927, Stanford, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** September 2, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1134561905) · Data from the CMS NPPES public registry.