IndividualActive
William Brennan, D.D.S.
NPI 1013931823 · Periodontics · Green Bay, WI
William Brennan, D.D.S. is a Periodontics provider in Green Bay, WI (NPI 1013931823).
Provider details
- NPI number
- 1013931823
- Entity type
- Individual
- Primary specialty
- PeriodonticsDental Providers
- Credential
- D.D.S.
- Sex
- Male
- Sole proprietor
- No
- License
- 0004656-015 (WI)
Specialties & taxonomies
Dental Providers
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
430 Main St
Green Bay, WI 54301-5115
Phone: (920) 431-1745
Fax: (920) 431-1715
Street-level locationGet directions
Mailing address
405 E Tallgrass Dr
Appleton, WI 54913-7502
Registry dates
- Enumerated
- 2006-07-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Brennan's NPI number?
- William Brennan's National Provider Identifier (NPI) is 1013931823, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Brennan's specialty?
- William Brennan is listed in the NPPES registry with a primary specialty of Periodontics (Dental Providers).
- Where is William Brennan located?
- William Brennan's practice location on file with NPPES is 430 Main St, Green Bay, WI 54301-5115.
- What is William Brennan's phone number?
- The practice phone number listed in the NPPES registry for William Brennan is (920) 431-1745.
- Is William Brennan's NPI active?
- Yes — William Brennan's NPI (1013931823) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.