Courtney Castelein, APRN, FNP
NPI 1932648771 · Nurse Practitioner · Janesville, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Courtney Castelein, APRN, FNP is a Nurse Practitioner provider in Janesville, WI (NPI 1932648771).
Provider details
- NPI number
- 1932648771
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN, FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 7532-33 (WI)
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 tenure33% of score
9 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 53 | 38 |
| Lisinopril | 33 | 25 |
| Amlodipine Besylate | 33 | 20 |
| Levothyroxine Sodium | 31 | 17 |
| Omeprazole | 30 | 17 |
| Gabapentin | 28 | 11 |
| Losartan Potassium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$172 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-02-13
- Last updated
- 2017-04-11
Frequently asked questions
- What is Courtney Castelein's NPI number?
- Courtney Castelein's National Provider Identifier (NPI) is 1932648771, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Courtney Castelein's specialty?
- Courtney Castelein is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Courtney Castelein located?
- Courtney Castelein's practice location on file with NPPES is 1000 Mineral Point Ave, Janesville, WI 53548-2940.
- What is Courtney Castelein's phone number?
- The practice phone number listed in the NPPES registry for Courtney Castelein is (608) 756-6826.
- Does Courtney Castelein accept Medicare?
- Courtney Castelein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Courtney Castelein's NPI active?
- Yes — Courtney Castelein's NPI (1932648771) is active in the NPPES registry as of the last update on 2017-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.