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JENNIFER CASSADY HAYEK
NPI 1639666852
Pediatrics in Seattle, WA

Active since April 13, 2018PECOS Enrolled
1959 NE PACIFIC ST, SEATTLE, WA 98195(206) 520-5000 Get Directions Write a Review

NPPES record last updated: September 30, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 30, 2022, Aug 31, 2022, Jul 5, 2022 and 1 more (4 updates tracked since 2018).

About Jennifer Cassady Hayek NPPES

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

JENNIFER CASSADY HAYEK (NPI 1639666852) is an individual pediatrics provider in Seattle, Washington, licensed in Washington (MD61284502) and active in the NPI registry since April 2018. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1639666852
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameJENNIFER CASSADY HAYEK
Location Address1959 NE PACIFIC STSeattle, WA 98195-0001
Mailing AddressPo Box 50095Seattle, WA 98145-5095
Phone(206) 520-5000
Sole ProprietorNo
Enumeration DateApril 13, 2018
Last NPPES UpdateSeptember 30, 20224 updates tracked since enumeration
NPPES CertifiedSeptember 30, 2022
✔ NPI 1639666852 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in WA · MD61284502
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Also ListedMedical Genetics · Clinical Genetics (M.D.)Taxonomy 207SG0201X · License MD61284502 (WA)
1959 NE PACIFIC ST, Seattle, WA 98195
Open in Google Maps ↗

Other Names 1

Former Name (1)Jennifer Ann Cassady

Accepted Insurance

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

Jennifer Cassady Hayek 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 Reassignments

2

Medicare enrollment records show Jennifer Hayek reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Association Of Chrmc And University Physicians
1.3 mi
Pediatrics
4500 SAND POINT WAY NE
Seattle, WA 98105
  • Reassigned Medicare billing, Washington enrollment
  • 1,443 clinicians in this Medicare group
NPI 1255449963 (206) 987-8450
The Association Of University Physicians
3.3 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 98195 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
$97.43 typical visit price
range $63.67 – $189.37
Typical copayment $24.35 (range $15.91 – $47.34)
Most-billed visit code 99203
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.

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 Jennifer Hayek's NPI number?

The NPI number for Jennifer Hayek is 1639666852. It was assigned to this individual provider in the NPPES registry on April 13, 2018. The provider is also known as Jennifer Ann Cassady.

Where is Jennifer Hayek located?

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

What is Jennifer Hayek's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Jennifer Hayek enrolled in Medicare?

Yes. Jennifer Hayek is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Jennifer Hayek's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jennifer Hayek reassigns Medicare benefits to 2 organizations: The Association Of Chrmc And University Physicians (Seattle, WA) and The Association Of University Physicians (Seattle, WA). Each 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 Jennifer Hayek's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jennifer Hayek accept?

Health plans from Ambetter Health, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Jennifer Hayek 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 Jennifer Hayek was last updated on September 30, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.