Mark Siegel, MD
NPI 1649322595 · Psychiatry Physician · Wauwatosa, WI
Mark Siegel, MD is a Psychiatry Physician provider in Wauwatosa, WI (NPI 1649322595).
Provider details
- NPI number
- 1649322595
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 23242020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
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
Mailing address
Registry dates
- Enumerated
- 2007-01-18
- Last updated
- 2011-12-20
Frequently asked questions
- What is Mark Siegel's NPI number?
- Mark Siegel's National Provider Identifier (NPI) is 1649322595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Siegel's specialty?
- Mark Siegel is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Siegel located?
- Mark Siegel's practice location on file with NPPES is 1220 Dewey Ave., Wauwatosa, WI 53213-2504.
- What is Mark Siegel's phone number?
- The practice phone number listed in the NPPES registry for Mark Siegel is (414) 454-6566.
- Is Mark Siegel's NPI active?
- Yes — Mark Siegel's NPI (1649322595) is active in the NPPES registry as of the last update on 2011-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.