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GILLIAN XU
NPI 1306533054
Family Medicine in Seattle, WA

Active since April 21, 2023PECOS Enrolled
550 16TH AVE STE 100, SEATTLE, WA 98122(206) 320-2484 Get Directions Write a Review

NPPES record last updated: October 6, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Gillian Xu NPPES

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

GILLIAN XU (NPI 1306533054) is an individual family medicine provider in Seattle, Washington, licensed in Washington (OL61688762) and active in the NPI registry since April 2023. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1306533054
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameGILLIAN XU
Location Address550 16TH AVE STE 100Seattle, WA 98122-5636
Mailing Address550 16th Ave Ste 100Seattle, WA 98122-5636 · (408) 431-8785
Phone(206) 320-2484
Sole ProprietorNo
Enumeration DateApril 21, 2023
Last NPPES UpdateOctober 6, 2025
NPPES CertifiedOctober 6, 2025
✔ NPI 1306533054 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in WA · OL61688762
Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

550 16TH AVE STE 100, Seattle, WA 98122
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gillian Xu 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 98122 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.

KRISTIENNE EDROSOLAN MD, MPH
Student in an Organized Health Care Education/Training Program
550 16TH AVE STE 100
SEATTLE, WA 98122
King County (206) 320-2484
MONICA GILLIE MD
Family Medicine
550 16TH AVE STE 100
SEATTLE, WA 98122
King County (206) 320-2484
EMILY J ZARAGOZA M.D.
Family Medicine
550 16TH AVE STE 100
SEATTLE, WA 98122
King County (206) 320-2484
TANMEET K. SETHI MD
Family Medicine
550 16TH AVE STE 100
SEATTLE, WA 98122
King County (206) 320-2484
EMILY ALYSE VAYDA MD
Family Medicine
550 16TH AVE STE 100
SEATTLE, WA 98122
King County (206) 320-2484
SONIA MARTINEZ DO
Student in an Organized Health Care Education/Training Program
550 16TH AVE STE 100
SEATTLE, WA 98122
King County (206) 320-2233
JACK SULLIVAN MD
Student in an Organized Health Care Education/Training Program
550 16TH AVE STE 100
SEATTLE, WA 98122
King County (120) 632-0248
DR. CHRISTOPHER TODD WINKLER PHARMD
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
550 16TH AVE STE 100
SEATTLE, WA 98122
King County (206) 320-2933

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 Gillian Xu's NPI number?

The NPI number for Gillian Xu is 1306533054. It was assigned to this individual provider in the NPPES registry on April 21, 2023.

Where is Gillian Xu located?

Gillian Xu practices at 550 16th Ave Ste 100, Seattle, WA 98122. The listed phone number is (206) 320-2484.

What is Gillian Xu's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Gillian Xu enrolled in Medicare?

Yes. Gillian Xu is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Gillian Xu was last updated on October 6, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.