Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

William Churk-Nam Auyeung, MD

Individual provider Internal Medicine Physician · NPI 1922365857

William Churk-Nam Auyeung, MD is an Internal Medicine Physician in Fremont, California. Licensed in California and Texas. Registered with an NPI since 2012.

Licensed in
CA, TX
In the registry since
2012
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

39400 Paseo Padre Pkwy
Fremont, CA 94538-2310
Phone: (510) 248-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence A135659 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence BP10043073 (TX)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence A135659 (CA)
Sleep Medicine (Internal Medicine) Physician Taxonomy 207RS0012X · Licence A135659 (CA)

Record details

NPI number1922365857
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 17, 2012
Last updated in NPPESNovember 18, 2022
Certification dateNovember 18, 2022

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Education $2,500 1 payment · educational material or training, not a fee
Food and Beverage $217 5 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

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