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

William P Mustas, PA

Individual provider Physician Assistant · NPI 1629080932

William P Mustas, PA is a Physician Assistant in Waukesha, Wisconsin. Qualified in 2000, 26 years ago. Practices with Los Alamos Physician Practices LLC, an 18-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
26
Licensed in
WI
In the registry since
2006
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

1111 Delafield St Ste 215
Waukesha, WI 53188-3403
Phone: (262) 542-0074
Fax: (262) 542-2803
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence 1307 (WI)

Record details

NPI number1629080932
Entity typeIndividual (Type 1)
GenderMale
Credentials PA
Sole proprietorYes
NPI enumeratedAugust 13, 2006
Last updated in NPPESSeptember 18, 2024
Certification dateSeptember 18, 2024

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice Los Alamos Physician Practices Llc — 18 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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