Niels Andersen, MD
NPI 1699883975 · Family Medicine Physician · Marshfield, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Niels Andersen, MD is a Family Medicine Physician provider in Marshfield, WI (NPI 1699883975).
Provider details
- NPI number
- 1699883975
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 29235 (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
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
- 2006-08-28
- Last updated
- 2007-07-08
Frequently asked questions
- What is Niels Andersen's NPI number?
- Niels Andersen's National Provider Identifier (NPI) is 1699883975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Niels Andersen's specialty?
- Niels Andersen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Niels Andersen located?
- Niels Andersen's practice location on file with NPPES is 1000 N Oak Ave, Marshfield, WI 54449-5777.
- What is Niels Andersen's phone number?
- The practice phone number listed in the NPPES registry for Niels Andersen is (715) 387-5168.
- Does Niels Andersen accept Medicare?
- Niels Andersen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Niels Andersen's NPI active?
- Yes — Niels Andersen's NPI (1699883975) 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.