Douglas Clark, MD
NPI 1821308974 · Obstetrics & Gynecology Physician · Brookfield, WI
Enrolled with Medicare as Order and Referring Only - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Clark, MD is a Obstetrics & Gynecology Physician provider in Brookfield, WI (NPI 1821308974).
Provider details
- NPI number
- 1821308974
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 16533 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 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
- 2010-10-07
- Last updated
- 2016-05-19
Frequently asked questions
- What is Douglas Clark's NPI number?
- Douglas Clark's National Provider Identifier (NPI) is 1821308974, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Clark's specialty?
- Douglas Clark is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Clark located?
- Douglas Clark's practice location on file with NPPES is 21010 Black Walnut Ln, Brookfield, WI 53045-4062.
- What is Douglas Clark's phone number?
- The practice phone number listed in the NPPES registry for Douglas Clark is (262) 780-0594.
- Does Douglas Clark accept Medicare?
- Douglas Clark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Clark's NPI active?
- Yes — Douglas Clark's NPI (1821308974) is active in the NPPES registry as of the last update on 2016-05-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.