NPPES file of Aug 9, 2026

Jamie Ashley Williams, LCSW

Clinical Social Worker · Walnut Creek, CA

Jamie Ashley Williams, LCSW is a clinical social worker with a practice address in Walnut Creek, California, and NPI 1245879725, issued on Dec 31, 2019. Check the license (California 92020, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1245879725
Name
Jamie Ashley Williams
Credential
LCSW
Primary taxonomy
Clinical Social Worker 1041C0700X
License number
92020 CA
Self-reported in NPPES; status is on the state search
Practice location
710 S Broadway Ste 300, Walnut Creek, CA 94596
Phone
(925) 295-4145
Enumerated
Dec 31, 2019
Record last updated
Dec 31, 2019 (not updated in 7 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20240905000775); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 710 S Broadway Ste 300

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kelly Bush, PSY.D.Psychologist1649321191
  2. Catherine Dionisio, PH.D.Clinical Psychologist1730365248
  3. Stephanie Gade, PHDPsychologist1871124222
  4. Anne Rachel Guijo, N.P.Family Nurse Practitioner1659898484
  5. Matthew HaynesClinical Social Worker1225308711
  6. Meredith Porter, PSYDPsychologist1598077463

Verify Jamie Ashley Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 92020
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Bixby Mental Health IncLos Angeles, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Jamie Ashley Williams among 36,261 clinical social worker records in California

Jamie Ashley Williams, LCSW is one of 36,261 clinical social worker records with a practice address in California. 6% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 67% of them.

  • NPI issued2019 · 67% of these records are older, 28% newer
  • In a Medicare fileYes · 6% of these records are
  • In the CMS Doctors and Clinicians fileYes · 11% of these records are
  • Graduated2016 · median 2012 among the 4,008 with a school on file
  • Record last updated2019 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

124 clinical social worker records list a practice address in Walnut Creek

They are 124 of the 6,170 NPPES records with a practice address in Walnut Creek, and 36,261 clinical social worker records in California.

The 8 clinical social worker records with the nearest ZIP codes

  1. Patricia Bortman, LCSWWalnut Creek, CA 945961275697344
  2. Sylvia Castillo, LCSWWalnut Creek, CA 945961790834844
  3. Valinda Croxton, LCSWWalnut Creek, CA 945961861556698
  4. Sue Flood, LCSWWalnut Creek, CA 945961053474924
  5. Rebecca Fontaine, LCSWWalnut Creek, CA 945961336204874
  6. Mary Gargaro, LCSWWalnut Creek, CA 945961316004062
  7. Lori Katzburg, LCSWWalnut Creek, CA 945961104853399
  8. Daniel Moskowitz, LCSWWalnut Creek, CA 945961952450819

Common questions

What is Jamie Ashley Williams, LCSW's NPI number?

Jamie Ashley Williams, LCSW's National Provider Identifier (NPI) is 1245879725, issued on Dec 31, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Jamie Ashley Williams, LCSW located?

The NPPES record lists a practice address at 710 S Broadway Ste 300, Walnut Creek, CA, 94596. Phone: (925) 295-4145. Providers update this record themselves, so call before visiting.

How can I verify Jamie Ashley Williams, LCSW's license?

NPPES lists California license number 92020, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.