IndividualActive
William Gaertner, M.D.
NPI 1689887010 · Family Medicine Physician · Milwaukee, WI
William Gaertner, M.D. is a Family Medicine Physician provider in Milwaukee, WI (NPI 1689887010).
Provider details
- NPI number
- 1689887010
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 23319 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(89/100 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
3930 S Lake Dr
Unit 501
Milwaukee, WI 53235-5238
Phone: (414) 483-2808
Fax: (414) 747-8874
Street-level locationGet directions
Mailing address
3930 S Lake Dr
Milwaukee, WI 53235-5238
Registry dates
- Enumerated
- 2007-05-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Gaertner's NPI number?
- William Gaertner's National Provider Identifier (NPI) is 1689887010, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Gaertner's specialty?
- William Gaertner is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Gaertner located?
- William Gaertner's practice location on file with NPPES is 3930 S Lake Dr, Milwaukee, WI 53235-5238.
- What is William Gaertner's phone number?
- The practice phone number listed in the NPPES registry for William Gaertner is (414) 483-2808.
- Is William Gaertner's NPI active?
- Yes — William Gaertner's NPI (1689887010) 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.