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

William R. Mason, DO

Individual provider Anesthesiology Physician · NPI 1942221791

William R. Mason, DO is an Anesthesiology Physician in Wausau, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2006.

Licensed in
WI
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

425 Pine Ridge Blvd Ste 211
Wausau, WI 54401-4123
Phone: (715) 845-5505
Fax: (715) 848-2884
Show map & directions

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

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 30749020 (WI)

Record details

NPI number1942221791
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 21, 2006
Last updated in NPPESJuly 9, 2007
Mailing address425 Pine Ridge Blvd, Suite 211, Wausau, WI 54401-4123

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