Mary Nissen
NPI 1659604403 · Nurse Practitioner · Sioux City, IA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Nissen is a Nurse Practitioner provider in Sioux City, IA (NPI 1659604403).
Provider details
- NPI number
- 1659604403
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- A-076138 (IA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
- 2009-09-11
- Last updated
- 2023-10-03
Frequently asked questions
- What is Mary Nissen's NPI number?
- Mary Nissen's National Provider Identifier (NPI) is 1659604403, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Nissen's specialty?
- Mary Nissen is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Nissen located?
- Mary Nissen's practice location on file with NPPES is 3303 Rebecca St, Sioux City, IA 51104-2324.
- What is Mary Nissen's phone number?
- The practice phone number listed in the NPPES registry for Mary Nissen is (712) 279-5458.
- Does Mary Nissen accept Medicare?
- Mary Nissen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Nissen's NPI active?
- Yes — Mary Nissen's NPI (1659604403) is active in the NPPES registry as of the last update on 2023-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.