Public provider listing
Dr. Mark W. Dreyer, MD
Dr. Mark W. Dreyer, MD is a Gastroenterologist practice in Waukesha, WI. Rated 3.7 from 3 public reviews. Phone is listed; no website is on file.

Address
1111 Delafield St #212
Waukesha, WI 53188
Phone
(262) 544-8622Website
Not listed
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Credentials, affiliations, and coverage
Credentials and licenses
- MD
- Medical License · NPPES / CMS · WI
- Professional license · WI
- Professional license · WI
Affiliations
- GI SPECIALISTS LLC
Sources
- CMS National Provider Directory · checked Aug 31, 2026
- nppes-registry · checked Aug 27, 2026
- google-maps-octoparse · checked Aug 15, 2026
Federal data is attributed to its source and does not imply CMS endorsement.
Public media
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Public reviews
Newest reviews
Review details are not available here. The listing reports 3 public reviews.



