Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C
Family Nurse Practitioner · Waukesha, WI
Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C is a family nurse practitioner with a practice address in Waukesha, Wisconsin, and NPI 1548854755, issued on Feb 28, 2021. Check the license (Wisconsin 10958-33, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nathaniel D. Fagan-Duerr
- Credential
- MSN, APNP, FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 10958-33 WI
Self-reported in NPPES; status is on the state search - Practice location
- 725 American Ave, Waukesha, WI 53188
- Phone
- (262) 928-1000
- Enumerated
- Feb 28, 2021
- Record last updated
- Nov 6, 2025
- Medicare enrollment
- Enrolled (PECOS I20211027002080); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,814 in Wisconsin → Look up another NPI →
Also registered at 725 American Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Nathaniel D. Fagan-Duerr in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 10958-33Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average family nurse practitioner in 2024
1,384 Medicare Part D claims for 211 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 120 claims were for opioids.
Most prescribed
- Levothyroxine Sodium150 claims
- Amlodipine Besylate56 claims
- Eliquis53 claims
- Allopurinol49 claims
- Furosemide41 claims
- Pantoprazole Sodium39 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Prohealth Medical Group IncWaukesha, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathaniel D. Fagan-Duerr among 2,814 family nurse practitioner records in Wisconsin
Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C is one of 2,814 family nurse practitioner records with a practice address in Wisconsin. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 64% of them.
- NPI issued2021 · 64% of these records are older, 29% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2020 · median 2019 among the 1,740 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
93 family nurse practitioner records list a practice address in Waukesha
They are 93 of the 2,814 NPPES records with a practice address in Waukesha, and 2,814 family nurse practitioner records in Wisconsin.
All 2,814 in Wisconsin → Every provider in Waukesha → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Stephanie Breslow, APNPWaukesha, WI 531881972904522
- Jennifer Johnson, FNPWaukesha, WI 531881043615560
- Cari Kazik, NP-CWaukesha, WI 531881194002642
- Joan Kiely, NPWaukesha, WI 531881376759498
- Holly Maciejewski, APNPWaukesha, WI 531881679950513
- Mercy Mahaga, APNP, RNWaukesha, WI 531881760882229
- Barbara Murphy, NPWaukesha, WI 531881487608444
- Carolyn Palmer, FNPWaukesha, WI 531881407248651
Common questions
What is Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C's NPI number?
Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C's National Provider Identifier (NPI) is 1548854755, issued on Feb 28, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C located?
The NPPES record lists a practice address at 725 American Ave, Waukesha, WI, 53188. Phone: (262) 928-1000. Providers update this record themselves, so call before visiting.
How can I verify Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C's license?
NPPES lists Wisconsin license number 10958-33, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C prescribe under Medicare Part D?
In 2024, Nathaniel D. Fagan-Duerr, MSN, APNP, FNP-C had 1,384 Medicare Part D claims for 211 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.