William Filbey, AA-C
NPI 1245621051 · Anesthesiologist Assistant · Madison, WI
Enrolled with Medicare as Practitioner - Anesthesiology Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Filbey, AA-C is a Anesthesiologist Assistant provider in Madison, WI (NPI 1245621051).
Provider details
- NPI number
- 1245621051
- Entity type
- Individual
- Primary specialty
- Anesthesiologist AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- AA-C
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% 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
Mailing address
Registry dates
- Enumerated
- 2015-02-16
- Last updated
- 2015-03-19
Frequently asked questions
- What is William Filbey's NPI number?
- William Filbey's National Provider Identifier (NPI) is 1245621051, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Filbey's specialty?
- William Filbey is listed in the NPPES registry with a primary specialty of Anesthesiologist Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Filbey located?
- William Filbey's practice location on file with NPPES is 600 Highland Ave, Madison, WI 53792-0001.
- What is William Filbey's phone number?
- The practice phone number listed in the NPPES registry for William Filbey is (608) 263-8100.
- Does William Filbey accept Medicare?
- William Filbey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Filbey's NPI active?
- Yes — William Filbey's NPI (1245621051) is active in the NPPES registry as of the last update on 2015-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.