Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Courtney E Castelein, APRN, FNP

Individual provider Nurse Practitioner · NPI 1932648771

Courtney E Castelein, APRN, FNP is a Nurse Practitioner in Janesville, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2017.

Licensed in
WI
In the registry since
2017
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

See every abbreviation used in this directory →

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Practice location Address checks out

1000 Mineral Point Ave
Janesville, WI 53548-2940
Phone: (608) 756-6826
Fax: (608) 756-6160
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 7532-33 (WI)

Record details

NPI number1932648771
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN , FNP
Sole proprietorNo
NPI enumeratedFebruary 13, 2017
Last updated in NPPESApril 11, 2017

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