WILLIAM CHURK-NAM AUYEUNG M.D.
NPI 1922365857
Internal Medicine - Pulmonary Disease in Fremont, CA

Q: What is William Auyeung's NPI number?

The NPI number for William Auyeung is 1922365857. It was assigned to this individual provider in the NPPES registry on April 17, 2012.

Q: What is William Auyeung's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Q: When was this NPI record last updated?

The NPPES record for William Auyeung was last updated on November 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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 April 17, 2012PECOS Enrolled

39400 PASEO PADRE PKWY, FREMONT, CA 94538(510) 248-3000 Get Directions Write a Review

NPPES record last updated: November 18, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 18, 2022, Mar 13, 2021 (2 updates tracked since 2021).

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About William Churk-nam Auyeung M.d. NPPES

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

WILLIAM CHURK-NAM AUYEUNG M.D. (NPI 1922365857) is an individual pulmonary disease provider in Fremont, California, licensed in California (A135659) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1922365857

Entity TypeIndividualMale

Primary Taxonomy207RP1001X

Provider Legal NameWILLIAM CHURK-NAM AUYEUNGCredential: M.D.

Location Address39400 PASEO PADRE PKWYFremont, CA 94538-2310

Mailing Address3801 Miranda Ave # 111pPalo Alto, CA 94304-1207 · (650) 493-5000 · Fax (650) 852-3276

Phone(510) 248-3000

Sole ProprietorNo

Enumeration DateApril 17, 2012

Last NPPES UpdateNovember 18, 20222 updates tracked since enumeration

NPPES CertifiedNovember 18, 2022

✔ NPI 1922365857 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RP1001X

License✔ Licensed in CA · A135659

Definition

An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.

Also ListedInternal MedicineTaxonomy 207R00000X · License BP10043073 (TX)

Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License A135659 (CA)

Also ListedInternal Medicine · Sleep MedicineTaxonomy 207RS0012X · License A135659 (CA)

39400 PASEO PADRE PKWY, Fremont, CA 94538

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Other Identifiers 2

OtherBP10043073TX · Texas Medical Board Permit

OtherA135659CA · Physician And Surgeon's License

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Churk-nam Auyeung M.d. 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.

Medicare Billing Reassignment

Medicare enrollment records show William Auyeung reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc

14 mi

Internal Medicine

1190 VETERANS BLVD
Redwood City, CA 94063

Reassigned Medicare billing, California enrollment
20,078 clinicians in this Medicare group

NPI 1639252604 (650) 299-2000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94538 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

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

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.

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.

MELINDA JENNY STEELE MD

Family Medicine

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 248-3000

HEUMIN LI R.PH.

Pharmacist

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 248-7577

SRILATA RAMAN M.D.

Internal Medicine

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 248-3623

MS. BARBARA TEDESCO ZEPEDA WHCNP

Registered Nurse (Women's Health Care, Ambulatory)

39400 PASEO PADRE PKWY, EMBARCADERO OB/GYN
FREMONT, CA 94538

Alameda County (510) 248-3591

CALVIN B. WHEELER MD

Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 795-3000

HANNELORE MOHR MD

Internal Medicine

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 795-3000

FREDERICK G. HOM MD

Internal Medicine

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 795-3000

MANJU JACOB

Dietitian, Registered

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 739-6412

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 Auyeung's NPI number?

The NPI number for William Auyeung is 1922365857. It was assigned to this individual provider in the NPPES registry on April 17, 2012.

Where is William Auyeung located?

William Auyeung practices at 39400 Paseo Padre Pkwy, Fremont, CA 94538. The listed phone number is (510) 248-3000.

What is William Auyeung's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is William Auyeung enrolled in Medicare?

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

Which organization bills Medicare for William Auyeung's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Auyeung reassigns Medicare benefits to Permanente Medical Group Inc (Redwood City, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Auyeung's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Auyeung was last updated on November 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.