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William Mason, D.O.
NPI 1942221791 · Anesthesiology Physician · Wausau, WI
William Mason, D.O. is a Anesthesiology Physician provider in Wausau, WI (NPI 1942221791).
Provider details
- NPI number
- 1942221791
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 30749020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
425 Pine Ridge Blvd
Suite 211
Wausau, WI 54401-4123
Phone: (715) 845-5505
Fax: (715) 848-2884
Street-level locationGet directions
Mailing address
425 Pine Ridge Blvd
Wausau, WI 54401-4123
Registry dates
- Enumerated
- 2006-07-21
- Last updated
- 2007-07-09
Frequently asked questions
- What is William Mason's NPI number?
- William Mason's National Provider Identifier (NPI) is 1942221791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mason's specialty?
- William Mason is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Mason located?
- William Mason's practice location on file with NPPES is 425 Pine Ridge Blvd, Wausau, WI 54401-4123.
- What is William Mason's phone number?
- The practice phone number listed in the NPPES registry for William Mason is (715) 845-5505.
- Is William Mason's NPI active?
- Yes — William Mason's NPI (1942221791) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.