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DR. STEFAN Z WIKTOR
NPI 1366306482
Internal Medicine in Seattle, WA

Active since December 12, 2025
5506 16TH AVE NE, SEATTLE, WA 98105(206) 661-3597 Get Directions Write a Review

NPPES record last updated: December 17, 2025. Verified against the NPPES registry weekly; last sync: September 13, 2026.

Record update history: Dec 17, 2025, Dec 12, 2025 (2 updates tracked since 2025).

About Dr. Stefan Z Wiktor NPPES

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

DR. STEFAN Z WIKTOR (NPI 1366306482) is an individual internal medicine provider in Seattle, Washington, licensed in Washington (61394323) and active in the NPI registry since December 2025.

NPPES Registry Identity

NPI1366306482
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. STEFAN Z WIKTOR
Location Address5506 16TH AVE NESeattle, WA 98105-3415
Mailing Address5506 16th Ave NeSeattle, WA 98105-3415 · (206) 661-3597
Phone(206) 661-3597
Sole ProprietorYes
Enumeration DateDecember 12, 2025
Last NPPES UpdateDecember 17, 20252 updates tracked since enumeration
NPPES CertifiedDecember 17, 2025
✔ NPI 1366306482 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WA · 61394323
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
5506 16TH AVE NE, Seattle, WA 98105
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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 Stefan Wiktor's NPI number?

The NPI number for Stefan Wiktor is 1366306482. It was assigned to this individual provider in the NPPES registry on December 12, 2025.

Where is Stefan Wiktor located?

Stefan Wiktor practices at 5506 16th Ave NE, Seattle, WA 98105. The listed phone number is (206) 661-3597.

What is Stefan Wiktor's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Stefan Wiktor was last updated on December 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.