1. Home
  2. Directory
  3. California
  4. Walnut Creek
  5. Social Worker
  6. NPI Profile

JAMIE ASHLEY WILLIAMS LCSW
NPI 1245879725
Social Worker - Clinical in Walnut Creek, CA

Active since December 31, 2019PECOS EnrolledAccepts Medicare Assignment
710 S BROADWAY STE 300, WALNUT CREEK, CA 94596(925) 295-4145 Get Directions Write a Review

NPPES record last updated: December 31, 2019. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Jamie Ashley Williams Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JAMIE ASHLEY WILLIAMS LCSW (NPI 1245879725) is an individual clinical provider in Walnut Creek, California, licensed in California (92020) and active in the NPI registry since December 2019. She is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1245879725
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameJAMIE ASHLEY WILLIAMSCredential: LCSW
Location Address710 S BROADWAY STE 300Walnut Creek, CA 94596-5229
Mailing Address710 S Broadway Ste 300Walnut Creek, CA 94596-5229
Phone(925) 295-4145
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateDecember 31, 2019
✔ NPI 1245879725 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in CA · 92020
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
710 S BROADWAY STE 300, Walnut Creek, CA 94596
Open in Google Maps ↗

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

Jamie Ashley Williams 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.

PECOS PAC ID3476093485
PECOS Enrollment IDI20240905000775
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Jamie Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Bixby Mental Health Inc.
335 mi
Clinical
600 S SAN VICENTE BLVD STE 100
Los Angeles, CA 90048
  • Reassigned Medicare billing, California enrollment
  • 4 clinicians in this Medicare group
NPI 1932891199 (310) 873-3312

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 94596 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $69.00 – $202.35
Typical copayment $0.00 (range $17.25 – $50.58)
Most-billed visit code NA
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. MATTHEW TERRY HAYNES
Social Worker (Clinical)
710 S BROADWAY STE 300
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-3980
DR. SHELBY KAROLINE SMITH PSY.D.
Psychologist (Addiction (Substance Use Disorder))
710 S BROADWAY STE 300
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-2960
MR. STEWART PROCTOR PH.D.
Psychologist (Clinical)
710 S BROADWAY STE 300
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-5937
MR. JASON ALLEN SPENSER LCSW
Social Worker (Clinical)
710 S BROADWAY STE 300
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4145
MEREDITH PORTER PSYD
Psychologist
710 S BROADWAY STE 300
WALNUT CREEK, CA 94596
Contra Costa County (252) 954-6199
DR. KELLY M BUSH PSY.D.
Psychologist
710 S BROADWAY STE 300, DEPT OF MENTAL HEALTH
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4145
MRS. ANNE RACHEL SERRANO GUIJO N.P.
Nurse Practitioner (Family)
710 S BROADWAY STE 300
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-6783
CATHERINE FAN DIONISIO PH.D.
Psychologist (Clinical)
710 S BROADWAY STE 300
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4145

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 Jamie Williams's NPI number?

The NPI number for Jamie Williams is 1245879725. It was assigned to this individual provider in the NPPES registry on December 31, 2019.

Where is Jamie Williams located?

Jamie Williams practices at 710 S Broadway Ste 300, Walnut Creek, CA 94596. The listed phone number is (925) 295-4145.

What is Jamie Williams's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Jamie Williams enrolled in Medicare?

Yes. Jamie Williams 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 Jamie Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jamie Williams reassigns Medicare benefits to Bixby Mental Health Inc. (Los Angeles, 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 Jamie 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 Jamie Williams was last updated on December 31, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.