Mark Johannsen, MD
NPI 1609812718 · Diagnostic Radiology Physician · Fremont, NE
Mark Johannsen, MD is a Diagnostic Radiology Physician provider in Fremont, NE (NPI 1609812718).
Provider details
- NPI number
- 1609812718
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 19406 (NE)
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
- 2006-06-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Johannsen's NPI number?
- Mark Johannsen's National Provider Identifier (NPI) is 1609812718, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Johannsen's specialty?
- Mark Johannsen is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Johannsen located?
- Mark Johannsen's practice location on file with NPPES is 450 E 23rd St, Fremont, NE 68025.
- What is Mark Johannsen's phone number?
- The practice phone number listed in the NPPES registry for Mark Johannsen is (402) 721-3070.
- Is Mark Johannsen's NPI active?
- Yes — Mark Johannsen's NPI (1609812718) 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.