Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

William Joseph Maloney

Individual provider Orthopaedic Surgery Physician · NPI 1255487500

William Joseph Maloney practises Orthopedic Surgery in Stanford, California. Graduated from Columbia University College of Physicians and Surgeons in 1983, 43 years ago. Practices with Stanford Health Care, a 3,085-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
43
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
CA
In the registry since
2007
Specialties on file
2
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Practice location Address checks out

300 Pasteur Dr
Stanford, CA 94305-2200
Phone: (650) 723-4000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 900 Blake Wilbur Dr, Palo Alto, CA 94304-2201 — (650) 723-1690

Specialties & licences

Adult Reconstructive Orthopaedic Surgery Physician (primary) Taxonomy 207XS0114X · Licence G52619 (CA)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence G52619 (CA)

Record details

NPI number1255487500
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJanuary 26, 2007
Last updated in NPPESApril 28, 2024
Certification dateApril 28, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 1983 (43 years in practice)
Group practice Stanford Health Care — 3085 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Hip replacement 21 times · 67th percentile
Knee replacement 33 times · 67th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients246
Services billed 360 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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.

Royalty or License $1,567,372 4 payments · paid for the use of something the clinician owns or invented, such as a patent; not a fee for care or for time
Travel and Lodging $43,806 57 payments · travel or lodging paid or reimbursed, such as to attend a conference
Consulting Fee $8,500 1 payment
Food and Beverage $2,538 34 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Stanford Health Care

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3085 clinicians in the practice; 12 are shown here.

Other providers in Stanford