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Gerald Demers, MD
NPI 1821103011 · Family Medicine Physician · Union Grove, WI
Gerald Demers, MD is a Family Medicine Physician provider in Union Grove, WI (NPI 1821103011).
Provider details
- NPI number
- 1821103011
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 27443 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 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
4320 67th Dr
Union Grove, WI 53182-9338
Phone: (262) 878-1211
Street-level locationGet directions
Mailing address
3301 W Forest Home Ave
Milwaukee, WI 53215-2843
Registry dates
- Enumerated
- 2006-08-20
- Last updated
- 2023-03-07
Frequently asked questions
- What is Gerald Demers's NPI number?
- Gerald Demers's National Provider Identifier (NPI) is 1821103011, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Demers's specialty?
- Gerald Demers is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gerald Demers located?
- Gerald Demers's practice location on file with NPPES is 4320 67th Dr, Union Grove, WI 53182-9338.
- What is Gerald Demers's phone number?
- The practice phone number listed in the NPPES registry for Gerald Demers is (262) 878-1211.
- Is Gerald Demers's NPI active?
- Yes — Gerald Demers's NPI (1821103011) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.