Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

REBECCA BATON WILLIAMS PHD
NPI 1831871235
Psychologist - Clinical in Seattle, WA

Q: What is Rebecca Williams's NPI number?

The NPI number for Rebecca Williams is 1831871235. It was assigned to this individual provider in the NPPES registry on August 4, 2023.

Q: What is Rebecca Williams's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Q: When was this NPI record last updated?

The NPPES record for Rebecca Williams was last updated on September 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 47 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.

Active since August 04, 2023PECOS Enrolled

908 JEFFERSON ST, SEATTLE, WA 98104(206) 744-5114 Get Directions Write a Review

NPPES record last updated: September 3, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Rebecca Baton Williams Phd NPPES

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

REBECCA BATON WILLIAMS PHD (NPI 1831871235) is an individual clinical provider in Seattle, Washington, licensed in Washington (PSYC.PY.70025502) and active in the NPI registry since August 2023. She is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1831871235

Entity TypeIndividualFemale

Primary Taxonomy103TC0700X

Provider Legal NameREBECCA BATON WILLIAMSCredential: PHD

Location Address908 JEFFERSON STSeattle, WA 98104-2433

Mailing AddressPo Box 50095Seattle, WA 98145-5095 · (206) 520-5700

Phone(206) 744-5114

Sole ProprietorNo

Medical School CMSOtherGraduated 2023

Enumeration DateAugust 4, 2023

Last NPPES UpdateSeptember 3, 2026

NPPES CertifiedSeptember 3, 2026

✔ NPI 1831871235 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

License✔ Licensed in WA · PSYC.PY.70025502

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

908 JEFFERSON ST, Seattle, WA 98104

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Rebecca Baton Williams Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2163989591

PECOS Enrollment IDI20260805004931

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 Rebecca Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

The Association Of University Physicians

0.3 mi

Anesthesiology

701 5TH AVE, SUITE 700
Seattle, WA 98104

Reassigned Medicare billing, Washington enrollment
4,364 clinicians in this Medicare group

NPI 1023041159 (206) 543-6420

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 98104 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

$189.37 typical visit price

range $63.67 – $189.37

Typical copayment $47.34 (range $15.91 – $47.34)

Most-billed visit code 99205

Established Patient

$111.00 typical visit price

range $21.12 – $155.00

Typical copayment $27.75 (range $5.28 – $38.75)

Most-billed visit code 99214

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 20

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

TOI ROBINSON

Physical Therapy Assistant

908 JEFFERSON ST
SEATTLE, WA 98104

King County (206) 744-1675

JOANNE C. WEN M.D.

Ophthalmology

908 JEFFERSON ST
SEATTLE, WA 98104

King County (206) 543-7250

CLAIRE T ANGEL D.O.

Optometrist

908 JEFFERSON ST, SUITE 101
SEATTLE, WA 98104

King County (206) 897-4774

STANLEY A HERRING

Physical Medicine & Rehabilitation

908 JEFFERSON ST
SEATTLE, WA 98104

King County (206) 744-0401

JOAN R HENDRICKS MD

Orthopaedic Surgery

908 JEFFERSON ST
SEATTLE, WA 98104

King County (206) 744-4830

ANDREW LIN KO MD

Neurological Surgery

908 JEFFERSON ST
SEATTLE, WA 98104

King County (206) 744-9300

SAAD ELRAHMANY MBBCH

Orthopaedic Surgery (Orthopaedic Surgery of the Spine)

908 JEFFERSON ST
SEATTLE, WA 98104

King County (206) 744-9340

HARBORVIEW MEDICAL CENTER

Eyewear Supplier

908 JEFFERSON ST, SUITE 101
SEATTLE, WA 98104

King County (206) 897-4774

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 Rebecca Williams's NPI number?

The NPI number for Rebecca Williams is 1831871235. It was assigned to this individual provider in the NPPES registry on August 4, 2023.

Where is Rebecca Williams located?

Rebecca Williams practices at 908 Jefferson St, Seattle, WA 98104. The listed phone number is (206) 744-5114.

What is Rebecca Williams's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Rebecca Williams enrolled in Medicare?

Yes. Rebecca Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Rebecca Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Rebecca Williams reassigns Medicare benefits to The Association Of University Physicians (Seattle, WA). 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 Rebecca 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 Rebecca Williams was last updated on September 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 47 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.