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NANCY THORDARSON MD
NPI 1962470674
Pediatrics in Marysville, WA

Active since March 09, 2006PECOS Enrolled
4420 76TH ST NE, MARYSVILLE, WA 98270(360) 651-7492 Get Directions Write a Review

NPPES record last updated: May 14, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 14, 2026, Jun 27, 2025, Dec 8, 2022 (3 updates tracked since 2022).

About Nancy Thordarson Md NPPES

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

NANCY THORDARSON MD (NPI 1962470674) is an individual pediatrics provider in Marysville, Washington, licensed in Washington (MD00025700) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1962470674
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameNANCY THORDARSONCredential: MD
Location Address4420 76TH ST NEMarysville, WA 98270-3726
Mailing Address7600 Evergreen WayEverett, WA 98203-6421 · (206) 860-5414
Phone(360) 651-7492
Sole ProprietorYes
Enumeration DateMarch 9, 2006
Last NPPES UpdateMay 14, 20263 updates tracked since enumeration
NPPES CertifiedMay 14, 2026
✔ NPI 1962470674 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in WA · MD00025700
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.
4420 76TH ST NE, Marysville, WA 98270
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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)

Nancy Thordarson Md 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

3

Medicare enrollment records show Nancy Thordarson reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Health & Services - Washington
2.5 mi
Family Medicine
11603 STATE AVE, SUITE G
Marysville, WA 98271
  • Reassigned Medicare billing, Washington enrollment
  • 705 clinicians in this Medicare group
NPI 1063663458 (360) 658-6800
Optum Care Washington PLLC
6.1 mi
Ambulatory Surgical
4011 172ND ST NE
Arlington, WA 98223
  • Reassigned Medicare billing, Washington enrollment
  • Also billed through NPI 1962499913 (Washington)
  • 1,285 clinicians in this Medicare group
NPI 1366154304 (360) 454-1900
The Polyclinic PLLC
32 mi
Audiologist
1145 BROADWAY
Seattle, WA 98122
  • Reassigned Medicare billing, Washington enrollment
  • 911 clinicians in this Medicare group
NPI 1174594634 (206) 329-1760

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 98270 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
$88.29 typical visit price
range $57.27 – $172.80
Typical copayment $22.07 (range $14.31 – $43.20)
Most-billed visit code 99203
Established Patient
$100.78 typical visit price
range $18.56 – $141.11
Typical copayment $25.19 (range $4.64 – $35.27)
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.

OPTUM CARE WASHINGTON PLLC
Pharmacy
4420 76TH ST NE
MARYSVILLE, WA 98270
Snohomish County (360) 651-7410
SI JUNG SUH
Internal Medicine
4420 76TH ST NE
MARYSVILLE, WA 98270
Snohomish County (360) 651-7495
DOROTHY COLLEEN TODD ARNP
Nurse Practitioner
4420 76TH ST NE
MARYSVILLE, WA 98270
Snohomish County (360) 304-8489
MANUEL ENRIQUE SIERRA ASCENCIO
Internal Medicine
4420 76TH ST NE
MARYSVILLE, WA 98270
Snohomish County (360) 651-7491
CAMERYN ELIZABETH-ANNE GRASSANOVITS PA-C
Physician Assistant
4420 76TH ST NE
MARYSVILLE, WA 98270
Snohomish County (360) 651-7495
CHRISTOPHER M BEARD MD
Family Medicine
4420 76TH ST NE
MARYSVILLE, WA 98270
Snohomish County (360) 651-7495
MARY RECKARD ARNP
Nurse Practitioner
4420 76TH ST NE
MARYSVILLE, WA 98270
Snohomish County (360) 651-7406
TRACY BRIGMAN ARNP
Nurse Practitioner (Pediatrics)
4420 76TH ST NE
MARYSVILLE, WA 98270
Snohomish County (206) 860-4700

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 Nancy Thordarson's NPI number?

The NPI number for Nancy Thordarson is 1962470674. It was assigned to this individual provider in the NPPES registry on March 9, 2006.

Where is Nancy Thordarson located?

Nancy Thordarson practices at 4420 76th St NE, Marysville, WA 98270. The listed phone number is (360) 651-7492.

What is Nancy Thordarson's specialty?

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

Is Nancy Thordarson enrolled in Medicare?

Yes. Nancy Thordarson is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Nancy Thordarson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Thordarson reassigns Medicare benefits to 3 organizations: Providence Health & Services - Washington (Marysville, WA), Optum Care Washington PLLC (Arlington, WA) and The Polyclinic PLLC (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 Nancy Thordarson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nancy Thordarson accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Nancy Thordarson 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 Nancy Thordarson was last updated on May 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.