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Mark Dreyer, M.D.
NPI 1396714861 · Gastroenterology Physician · Waukesha, WI
Mark Dreyer, M.D. is a Gastroenterology Physician provider in Waukesha, WI (NPI 1396714861).
Provider details
- NPI number
- 1396714861
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 23754-020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
1111 Delafield St
Suite 212
Waukesha, WI 53188-3417
Phone: (262) 544-8622
Fax: (262) 544-8630
Street-level locationGet directions
Mailing address
1111 Delafield St
Waukesha, WI 53188-3417
Registry dates
- Enumerated
- 2006-03-16
- Last updated
- 2014-08-12
Frequently asked questions
- What is Mark Dreyer's NPI number?
- Mark Dreyer's National Provider Identifier (NPI) is 1396714861, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Dreyer's specialty?
- Mark Dreyer is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Dreyer located?
- Mark Dreyer's practice location on file with NPPES is 1111 Delafield St, Waukesha, WI 53188-3417.
- What is Mark Dreyer's phone number?
- The practice phone number listed in the NPPES registry for Mark Dreyer is (262) 544-8622.
- Is Mark Dreyer's NPI active?
- Yes — Mark Dreyer's NPI (1396714861) is active in the NPPES registry as of the last update on 2014-08-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.