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Nicholas Siebers, MD
NPI 1215998687 · Internal Medicine Physician · Madison, WI
Nicholas Siebers, MD is a Internal Medicine Physician provider in Madison, WI (NPI 1215998687).
Provider details
- NPI number
- 1215998687
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- 44285 (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
5249 E Terrace Dr
Madison, WI 53718
Phone: (608) 265-1200
Fax: (608) 833-6932
Street-level locationGet directions
Mailing address
8007 Excelsior Drive
Madison, WI 53717
Registry dates
- Enumerated
- 2006-03-28
- Last updated
- 2007-07-08
Frequently asked questions
- What is Nicholas Siebers's NPI number?
- Nicholas Siebers's National Provider Identifier (NPI) is 1215998687, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Siebers's specialty?
- Nicholas Siebers is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Siebers located?
- Nicholas Siebers's practice location on file with NPPES is 5249 E Terrace Dr, Madison, WI 53718.
- What is Nicholas Siebers's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Siebers is (608) 265-1200.
- Is Nicholas Siebers's NPI active?
- Yes — Nicholas Siebers's NPI (1215998687) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.