SARAH A. KORKOWSKI ARNP
NPI 1740209352
Nurse Practitioner - Neonatal in Seattle, WA

Q: What is Sarah Korkowski's NPI number?

The NPI number for Sarah Korkowski is 1740209352. It was assigned to this individual provider in the NPPES registry on July 18, 2006. The provider is also known as Sarah A. Martenstein.

Q: What is Sarah Korkowski's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Neonatal, with taxonomy code 363LN0000X.

Q: When was this NPI record last updated?

The NPPES record for Sarah Korkowski was last updated on March 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.

Active since July 18, 2006PECOS Enrolled

4800 SAND POINT WAY NE, CSB 240, SEATTLE, WA 98105(206) 987-2394(206) 987-7126 Get Directions Write a Review

NPPES record last updated: March 17, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Sarah A. Korkowski Arnp NPPES

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

SARAH A. KORKOWSKI ARNP (NPI 1740209352) is an individual neonatal provider in Seattle, Washington, licensed in Washington (AP30006489) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in Seattle.

NPPES Registry Identity

NPI1740209352

Entity TypeIndividualFemale

Primary Taxonomy363LN0000X

Provider Legal NameSARAH A. KORKOWSKICredential: ARNP

Location Address4800 SAND POINT WAY NE, CSB 240Seattle, WA 98105-3901

Mailing Address4800 Sand Point Way Ne, Csb 240Seattle, WA 98105-3901 · (206) 987-2394 · Fax (206) 987-7126

Phone(206) 987-2394

Fax(206) 987-7126

Sole ProprietorNo

Enumeration DateJuly 18, 2006

Last NPPES UpdateMarch 17, 2025

NPPES CertifiedMarch 17, 2025

✔ NPI 1740209352 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyNurse Practitioner · NeonatalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LN0000X

License✔ Licensed in WA · AP30006489

Also ListedRegistered NurseTaxonomy 163W00000X · License RN00148675 (WA)

Also ListedRegistered Nurse · PediatricsTaxonomy 163WP0200X · License AP30006489 (WA)

Also ListedNurse PractitionerTaxonomy 363L00000X · License AP30006489 (WA)

4800 SAND POINT WAY NE, Seattle, WA 98105

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Other Names 1

Former Name (1)Sarah A. Martenstein

Secondary Practice Location 1

Location 11959 NE Pacific StSeattle, WA 98195-3901 · Phone (206) 520-5000

Other Identifiers 3

Other0204981WA · Labor & Industry

Other94119UWA · Regence Blueshield

Medicaid9637133WA

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, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sarah A. Korkowski Arnp 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98105 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.

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 Sarah Korkowski's NPI number?

The NPI number for Sarah Korkowski is 1740209352. It was assigned to this individual provider in the NPPES registry on July 18, 2006. The provider is also known as Sarah A. Martenstein.

Where is Sarah Korkowski located?

Sarah Korkowski practices at 4800 Sand Point Way NE Csb 240, Seattle, WA 98105. The listed phone number is (206) 987-2394.

What is Sarah Korkowski's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Neonatal, with taxonomy code 363LN0000X.

Is Sarah Korkowski enrolled in Medicare?

Yes. Sarah Korkowski is registered in the Medicare PECOS enrollment system.

What insurance does Sarah Korkowski accept?

Health plans from Premera Blue Cross Blue Shield of Alaska list Sarah Korkowski 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 Sarah Korkowski was last updated on March 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.