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DR. KATHY A STEPIEN MD
NPI 1598959314
Pediatrics in Bellevue, WA

Active since September 05, 2007PECOS Enrolled
11511 NE 10TH ST, BELLEVUE, WA 98004(425) 502-3000 Get Directions Write a Review

NPPES record last updated: May 4, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 4, 2021, May 9, 2019, Mar 27, 2017 (3 updates tracked since 2017).

About Dr. Kathy A Stepien Md NPPES

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

DR. KATHY A STEPIEN MD (NPI 1598959314) is an individual pediatrics provider in Bellevue, Washington, licensed in Washington (MD60721936) and active in the NPI registry since September 2007. She is enrolled in Medicare PECOS and maintains a secondary practice location in Seattle.

NPPES Registry Identity

NPI1598959314
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. KATHY A STEPIENCredential: MD
Location Address11511 NE 10TH STBellevue, WA 98004-8578
Mailing Address11511 Ne 10th StBellevue, WA 98004-8578 · (425) 502-3000
Phone(425) 502-3000
Sole ProprietorNo
Enumeration DateSeptember 5, 2007
Last NPPES UpdateMay 4, 20213 updates tracked since enumeration
NPPES CertifiedMay 4, 2021
✔ NPI 1598959314 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in WA · MD60721936
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.
11511 NE 10TH ST, Bellevue, WA 98004
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Secondary Practice Location 1

Location 1747 BroadwaySeattle, WA 98122 · Phone (206) 215-2700 · Fax (206) 215-3101

Other Identifiers 1

Medicaid1598959314WA

Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Kathy A Stepien 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 Kathy Stepien reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Seattle Children's Hospital
5.4 mi
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
Kaiser Foundation Health Plan Of Washington
7.1 mi
Multi-Specialty
320 WESTLAKE AVE. N., SUITE 100
Seattle, WA 98109
  • Reassigned Medicare billing, Washington enrollment
  • 2,678 clinicians in this Medicare group
NPI 1396810701 (206) 448-6561
Southeast Alaska Regional Health Consortium
668 mi
Clinic/Center
SUNRISE LODGE
Edna Bay, AK 99901
  • Reassigned Medicare billing, Texas enrollment
  • 640 clinicians in this Medicare group
NPI 1518403906 (907) 874-4700

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 98004 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.

PATSY C LAZAROUS MD
Internal Medicine
11511 NE 10TH ST
BELLEVUE, WA 98004
King County (425) 502-3000
SALMA F GHARIB M.D.
Emergency Medicine (Emergency Medical Services)
11511 NE 10TH ST
BELLEVUE, WA 98004
King County (425) 502-3000
PAULA J LINS P.A.-C
Physician Assistant
11511 NE 10TH ST
BELLEVUE, WA 98004
King County (425) 502-3000
SARAH PROCKO CNM
Advanced Practice Midwife
11511 NE 10TH ST
BELLEVUE, WA 98004
King County (425) 502-3000
BENNET M. WANG M.D.
Internal Medicine (Pulmonary Disease)
11511 NE 10TH ST
BELLEVUE, WA 98004
King County (425) 502-3000
CARA PRANGE PT
Physical Therapist
11511 NE 10TH ST
BELLEVUE, WA 98004
King County (800) 995-5658
DR. BRYN MCKINNON SMITH MD
Obstetrics & Gynecology
11511 NE 10TH ST
BELLEVUE, WA 98004
King County (425) 502-3000
MR. GARRETT MATTHEW KOSLAN CNM
Advanced Practice Midwife
11511 NE 10TH ST
BELLEVUE, WA 98004
King County (425) 502-3000

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 Kathy Stepien's NPI number?

The NPI number for Kathy Stepien is 1598959314. It was assigned to this individual provider in the NPPES registry on September 5, 2007.

Where is Kathy Stepien located?

Kathy Stepien practices at 11511 NE 10th St, Bellevue, WA 98004. The listed phone number is (425) 502-3000.

What is Kathy Stepien's specialty?

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

Is Kathy Stepien enrolled in Medicare?

Yes. Kathy Stepien is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Kathy Stepien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kathy Stepien reassigns Medicare benefits to 3 organizations: Seattle Children's Hospital (Seattle, WA), Kaiser Foundation Health Plan Of Washington (Seattle, WA) and Southeast Alaska Regional Health Consortium (Edna Bay, AK). 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 Kathy Stepien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Kathy Stepien accept?

Health plans from Premera Blue Cross Blue Shield of Alaska list Kathy Stepien 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 Kathy Stepien was last updated on May 4, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.