Greta Kostac, APNP
NPI 1841307386 · Nurse Practitioner · Fond Du Lac, WI
Greta Kostac, APNP is a Nurse Practitioner provider in Fond Du Lac, WI (NPI 1841307386).
Provider details
- NPI number
- 1841307386
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APNP
- Sex
- Female
- Sole proprietor
- No
- License
- 1274-033 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
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
- 2006-08-23
- Last updated
- 2020-02-20
- Certified
- 2020-02-20
Frequently asked questions
- What is Greta Kostac's NPI number?
- Greta Kostac's National Provider Identifier (NPI) is 1841307386, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Greta Kostac's specialty?
- Greta Kostac is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Greta Kostac located?
- Greta Kostac's practice location on file with NPPES is 210 Wisconsin American Dr, Fond Du Lac, WI 54935.
- What is Greta Kostac's phone number?
- The practice phone number listed in the NPPES registry for Greta Kostac is (920) 907-7000.
- Is Greta Kostac's NPI active?
- Yes — Greta Kostac's NPI (1841307386) is active in the NPPES registry as of the last update on 2020-02-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.