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MS. KATHERINE L SIEU RN, NP
NPI 1356591085
Nurse Practitioner - Adult Health in Walnut Creek, CA

Active since September 30, 2008PECOS Enrolled
500 LENNON LN, WALNUT CREEK, CA 94598(925) 939-9610(925) 939-9630 Get Directions Write a Review

NPPES record last updated: August 27, 2010. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Ms. Katherine L Sieu Rn, Np NPPES

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

MS. KATHERINE L SIEU RN, NP (NPI 1356591085) is an individual adult health provider in Walnut Creek, California, licensed in California (18369) and active in the NPI registry since September 2008. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1356591085
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameMS. KATHERINE L SIEUCredential: RN, NP
Location Address500 LENNON LNWalnut Creek, CA 94598-2415
Mailing Address500 Lennon LnWalnut Creek, CA 94598-2415 · (925) 939-9610 · Fax (925) 939-9630
Phone(925) 939-9610
Fax(925) 939-9630
Sole ProprietorYes
Enumeration DateSeptember 30, 2008
Last NPPES UpdateAugust 27, 2010
✔ NPI 1356591085 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License✔ Licensed in CA · 18369
500 LENNON LN, Walnut Creek, CA 94598
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Katherine L Sieu Rn, Np 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 94598 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier12 claims12 services$69.20 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 15

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

STEPHANIE MARTHA CHIU NP
Nurse Practitioner
500 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-9610
ANOUK LILY THOMAS DNP, FNP-BC
Nurse Practitioner (Family)
500 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-9610
MS. RENSINA TEN HOLT RN
Nurse Practitioner (Family)
500 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-9610
MICHAEL PAUL SHERMAN M.D., PHD
Internal Medicine (Hematology & Oncology)
500 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-9610
TRACIE WATSON D.O.
Internal Medicine (Hematology & Oncology)
500 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-9610
MS. VON HOANG FNP-C
Nurse Practitioner (Family)
500 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-9610
ALEENA KHAN NP-C
Nurse Practitioner (Family)
500 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-9610
GAURI BADHWAR SHARMA D.O.
Internal Medicine (Hematology & Oncology)
500 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-9610

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 Katherine Sieu's NPI number?

The NPI number for Katherine Sieu is 1356591085. It was assigned to this individual provider in the NPPES registry on September 30, 2008.

Where is Katherine Sieu located?

Katherine Sieu practices at 500 Lennon Ln, Walnut Creek, CA 94598. The listed phone number is (925) 939-9610.

What is Katherine Sieu's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Katherine Sieu enrolled in Medicare?

Yes. Katherine Sieu is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Katherine Sieu was last updated on August 27, 2010. NPI Profile syncs with the weekly NPPES data releases published by CMS.