WILLIAM A. SIA NP-C
NPI 1679063945
Nurse Practitioner - Family in Upland, CA

Q: What is William Sia's NPI number?

The NPI number for William Sia is 1679063945. It was assigned to this individual provider in the NPPES registry on May 13, 2018.

Q: What is William Sia's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for William Sia was last updated on September 12, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.

Active since May 13, 2018PECOS Enrolled

1382 E FOOTHILL BLVD, UPLAND, CA 91786(909) 982-6500(909) 920-0406 Get Directions Write a Review

NPPES record last updated: September 12, 2019. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 12, 2019, May 13, 2018 (2 updates tracked since 2018).

On this page

About William A. Sia Np-c NPPES

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

WILLIAM A. SIA NP-C (NPI 1679063945) is an individual family provider in Upland, California, licensed in California (F03180293) and active in the NPI registry since May 2018. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1679063945

Entity TypeIndividualMale

Primary Taxonomy363LF0000X

Provider Legal NameWILLIAM A. SIACredential: NP-C

Location Address1382 E FOOTHILL BLVDUpland, CA 91786-4014

Mailing Address1365 Wickham CtSan Dimas, CA 91773-3862 · (626) 261-3175

Phone(909) 982-6500

Fax(909) 920-0406

Sole ProprietorNo

Enumeration DateMay 13, 2018

Last NPPES UpdateSeptember 12, 20192 updates tracked since enumeration

✔ NPI 1679063945 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

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

Taxonomy Code363LF0000X

License✔ Licensed in CA · F03180293

1382 E FOOTHILL BLVD, Upland, CA 91786

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)

William A. Sia Np-c 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 91786 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

$91.88 typical visit price

range $59.60 – $179.42

Typical copayment $22.97 (range $14.90 – $44.85)

Most-billed visit code 99203

Established Patient

$104.64 typical visit price

range $19.37 – $146.42

Typical copayment $26.16 (range $4.84 – $36.60)

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 4

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

INLAND CARDIOLOGY HEART FAILURE CLINIC

Internal Medicine (Cardiovascular Disease)

1382 E FOOTHILL BLVD
UPLAND, CA 91786

San Bernardino County (909) 982-6500

RUSHMI REEHAL PA-C

Physician Assistant

1382 E FOOTHILL BLVD
UPLAND, CA 91786

San Bernardino County (909) 982-6500

B DON AHN MD INC

Internal Medicine (Cardiovascular Disease)

1382 E FOOTHILL BLVD
UPLAND, CA 91786

San Bernardino County (909) 982-6500

PROHEALTH PARTNERS A MEDICAL GROUP INC

Internal Medicine (Cardiovascular Disease)

1382 E FOOTHILL BLVD
UPLAND, CA 91786

San Bernardino County (909) 982-6500

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 William Sia's NPI number?

The NPI number for William Sia is 1679063945. It was assigned to this individual provider in the NPPES registry on May 13, 2018.

Where is William Sia located?

William Sia practices at 1382 E Foothill Blvd, Upland, CA 91786. The listed phone number is (909) 982-6500.

What is William Sia's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is William Sia enrolled in Medicare?

Yes. William Sia is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for William Sia was last updated on September 12, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.