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ALISON WHITTAKER HIRST PETERSON M.S., CCC-SLP
NPI 1871808360
Speech-Language Pathologist in Seattle, WA

Active since August 10, 2010
1959 NE PACIFIC ST, SEATTLE, WA 98195(206) 520-5000 Get Directions Write a Review

NPPES record last updated: August 15, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Alison Whittaker Hirst Peterson M.s., Ccc-slp NPPES

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

ALISON WHITTAKER HIRST PETERSON M.S., CCC-SLP (NPI 1871808360) is an individual speech-language pathologist provider in Seattle, Washington, licensed in Washington (LL60182798) and active in the NPI registry since August 2010.

NPPES Registry Identity

NPI1871808360
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameALISON WHITTAKER HIRST PETERSONCredential: M.S., CCC-SLP
Location Address1959 NE PACIFIC STSeattle, WA 98195-0001
Mailing Address1959 Ne Pacific StSeattle, WA 98195-0001 · (206) 520-5000
Phone(206) 520-5000
Sole ProprietorYes
Enumeration DateAugust 10, 2010
Last NPPES UpdateAugust 15, 2023
NPPES CertifiedAugust 15, 2023
✔ NPI 1871808360 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers
Taxonomy Code235Z00000X
Licenses✔ Licensed in WA · LL60182798✔ Licensed in WA · SI60116987
Definition
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.
1959 NE PACIFIC ST, Seattle, WA 98195
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Other Names 1

Professional Name (2)Alison Whittaker Hirst M.s., Ccc-slp

Other Identifiers 3

OtherP01229414WA · Railroad Mdc
Other0269890WA · L&i
Medicaid1871808360WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include 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)

Alison Whittaker Hirst Peterson M.s., Ccc-slp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignment

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

Virginia Mason Medical Center
0.9 mi
Pediatrics
2671 NE 46TH ST
Seattle, WA 98105
  • Reassigned Medicare billing, Washington enrollment
  • 1,021 clinicians in this Medicare group
NPI 1104974302 (206) 525-8000

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.

LEONIE A NEVILLE PHARMD
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 598-4874
ALISA BETH KACHIKIS M.D.
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1959 NE PACIFIC ST, 3RD FLOOR SW 350
SEATTLE, WA 98195
King County (206) 598-4070
MS. MARY PATRICIA DODGE MS, OTR/L
Occupational Therapist
1959 NE PACIFIC ST, MAILBOX 356490
SEATTLE, WA 98195
King County (206) 598-4830
RIKA SHIRAKAWA M.D.
Ophthalmology
1959 NE PACIFIC ST, BOX 365485
SEATTLE, WA 98195
King County (206) 558-9616
VEDA TSOI M.D.
Anesthesiology
1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (801) 556-7628
KATHRYN TAMURA PHARM.D.
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
1959 NE PACIFIC ST, BOX 356015
SEATTLE, WA 98195
King County (206) 598-6060
DR. MARK ROBERT, MICHAEL KILGORE M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
1959 NE PACIFIC ST, BOX 356100
SEATTLE, WA 98195
King County (206) 598-1821
DR. SERKAN MEHMET SAHIN M.D.
Hospitalist
1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 543-6420

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 Alison Peterson's NPI number?

The NPI number for Alison Peterson is 1871808360. It was assigned to this individual provider in the NPPES registry on August 10, 2010. The provider is also known as Alison Whittaker Hirst M.S., Ccc-Slp.

Where is Alison Peterson located?

Alison Peterson practices at 1959 NE Pacific St, Seattle, WA 98195. The listed phone number is (206) 520-5000.

What is Alison Peterson's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

Is Alison Peterson enrolled in Medicare?

Yes. Alison Peterson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alison Peterson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alison Peterson reassigns Medicare benefits to Virginia Mason Medical Center (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 Alison Peterson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alison Peterson accept?

Health plans from Providence Health Plan list Alison Peterson 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 Alison Peterson was last updated on August 15, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.