Glenn Sondag, MD
NPI 1518950120 · Dermatology Physician · Brookfield, WI
Glenn Sondag, MD is a Dermatology Physician provider in Brookfield, WI (NPI 1518950120).
Provider details
- NPI number
- 1518950120
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 21528020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
Mailing address
Registry dates
- Enumerated
- 2005-08-30
- Last updated
- 2008-04-20
Frequently asked questions
- What is Glenn Sondag's NPI number?
- Glenn Sondag's National Provider Identifier (NPI) is 1518950120, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Glenn Sondag's specialty?
- Glenn Sondag is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Glenn Sondag located?
- Glenn Sondag's practice location on file with NPPES is 13800 W North Ave, Brookfield, WI 53005-4974.
- What is Glenn Sondag's phone number?
- The practice phone number listed in the NPPES registry for Glenn Sondag is (262) 754-4488.
- Is Glenn Sondag's NPI active?
- Yes — Glenn Sondag's NPI (1518950120) is active in the NPPES registry as of the last update on 2008-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.