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HILLARY THOMASON
NPI 1922982297
Social Worker in Seattle, WA

Active since August 01, 2025PECOS Enrolled
4800 SAND POINT WAY NE, SEATTLE, WA 98105(206) 987-9202 Get Directions Write a Review

NPPES record last updated: August 27, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Hillary Thomason NPPES

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

HILLARY THOMASON (NPI 1922982297) is an individual social worker in Seattle, Washington and active in the NPI registry since August 2025. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1922982297
Entity TypeIndividualFemale
Primary Taxonomy104100000X
Provider Legal NameHILLARY THOMASON
Location Address4800 SAND POINT WAY NESeattle, WA 98105-3901
Mailing Address7812 8th Ave NwSeattle, WA 98117-3209
Phone(206) 987-9202
Sole ProprietorYes
Enumeration DateAugust 1, 2025
Last NPPES UpdateAugust 27, 2025
NPPES CertifiedAugust 27, 2025
✔ NPI 1922982297 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
Also ListedSocial Worker · ClinicalTaxonomy 1041C0700X
4800 SAND POINT WAY NE, Seattle, WA 98105
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Hillary Thomason is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

Seattle Children's Hospital
Same address
Specialist
4800 SAND POINT WAY NE
Seattle, WA 98105
  • Reassigned Medicare billing, Washington enrollment
  • Medicare enrollment name: Seattle Childrens Hospital
  • 912 clinicians in this Medicare group
NPI 1003319500 (206) 987-2000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

NALINI MALARKKAN MD
Anesthesiology
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2728
MS. LINDA E EBLEN MA
Speech-Language Pathologist
4800 SAND POINT WAY NE, MAIL STOP W-6839
SEATTLE, WA 98105
King County (206) 987-6164
DR. JAMES TOLIVER BENNETT JR. M.D., PH.D.
Medical Genetics (Clinical Molecular Genetics)
4800 SAND POINT WAY NE, GENETIC MEDICINE
SEATTLE, WA 98105
King County (206) 987-2056
DR. LESLIE ANN DERVAN MD
Pediatrics (Pediatric Critical Care Medicine)
4800 SAND POINT WAY NE, MB.10.620
SEATTLE, WA 98105
King County (206) 987-0293
DR. INDI TREHAN MD
Pediatrics (Pediatric Infectious Diseases)
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2000
MS. JENNIFER PATANO CNP
Nurse Practitioner (Pediatrics)
4800 SAND POINT WAY NE, MS O.7.720
SEATTLE, WA 98105
King County (206) 987-8949
MRS. SUSAN L HOLTZCLAW ARNP
Nurse Practitioner (Family)
4800 SAND POINT WAY NE, MAILSTOP T-2108
SEATTLE, WA 98105
King County (206) 987-5691
SHENG ZHOU MD
Otolaryngology (Pediatric Otolaryngology)
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2105

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 Hillary Thomason's NPI number?

The NPI number for Hillary Thomason is 1922982297. It was assigned to this individual provider in the NPPES registry on August 1, 2025.

Where is Hillary Thomason located?

Hillary Thomason practices at 4800 Sand Point Way NE, Seattle, WA 98105. The listed phone number is (206) 987-9202.

What is Hillary Thomason's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

Is Hillary Thomason enrolled in Medicare?

Yes. Hillary Thomason is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Hillary Thomason's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hillary Thomason reassigns Medicare benefits to Seattle Children's Hospital (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 Hillary Thomason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Hillary Thomason accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Hillary Thomason 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 Hillary Thomason was last updated on August 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.