Martin Janssen, M.D.
NPI 1417926023 · General Practice Physician · Friendship, WI
Martin Janssen, M.D. is a General Practice Physician provider in Friendship, WI (NPI 1417926023).
Provider details
- NPI number
- 1417926023
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 13648 (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
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
Mailing address
Registry dates
- Enumerated
- 2006-03-16
- Last updated
- 2012-08-13
Frequently asked questions
- What is Martin Janssen's NPI number?
- Martin Janssen's National Provider Identifier (NPI) is 1417926023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martin Janssen's specialty?
- Martin Janssen is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Martin Janssen located?
- Martin Janssen's practice location on file with NPPES is 402 W Lake St, Friendship, WI 53934-9699.
- What is Martin Janssen's phone number?
- The practice phone number listed in the NPPES registry for Martin Janssen is (608) 339-3331.
- Is Martin Janssen's NPI active?
- Yes — Martin Janssen's NPI (1417926023) is active in the NPPES registry as of the last update on 2012-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.