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MR. NATHANIEL D FAGAN-DUERR MSN, APNP, FNP-C
NPI 1548854755
Nurse Practitioner - Family in Waukesha, WI

Active since February 28, 2021PECOS EnrolledAccepts Medicare Assignment
725 AMERICAN AVE, WAUKESHA, WI 53188(262) 928-1000 Get Directions Write a Review

NPPES record last updated: November 6, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 6, 2025, Sep 15, 2021, Feb 28, 2021 (3 updates tracked since 2021).

About Mr. Nathaniel D Fagan-duerr Msn, Apnp, Fnp-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. NATHANIEL D FAGAN-DUERR MSN, APNP, FNP-C (NPI 1548854755) is an individual family provider in Waukesha, Wisconsin, licensed in Wisconsin (10958-33) and active in the NPI registry since February 2021. He is enrolled in Medicare PECOS, is affiliated with Waukesha Memorial Hospital, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1548854755
Entity TypeIndividualMale
Primary Taxonomy363LF0000X
Provider Legal NameMR. NATHANIEL D FAGAN-DUERRCredential: MSN, APNP, FNP-C
Location Address725 AMERICAN AVEWaukesha, WI 53188-5031
Mailing Address7733 W Burleigh StMilwaukee, WI 53222-5003 · (414) 837-6300
Phone(262) 928-1000
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateFebruary 28, 2021
Last NPPES UpdateNovember 6, 20253 updates tracked since enumeration
NPPES CertifiedNovember 6, 2025
✔ NPI 1548854755 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in WI · 10958-33
725 AMERICAN AVE, Waukesha, WI 53188
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), Security Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Nathaniel D Fagan-duerr Msn, Apnp, Fnp-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1557759321
PECOS Enrollment IDI20211027002080
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

5

Medicare enrollment records show Nathaniel Fagan-duerr reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Prohealth Medical Group Inc
Same address
Family Medicine
721 AMERICAN AVE, SUITE 310
Waukesha, WI 53188
  • Reassigned Medicare billing, Wisconsin enrollment
  • 528 clinicians in this Medicare group
NPI 1629225677 (262) 928-4880
Maple Medical Sc
1.7 mi
Physical Medicine & Rehabilitation
2428 N GRANDVIEW BLVD STE 102
Waukesha, WI 53188
  • Reassigned Medicare billing, Wisconsin enrollment
  • 141 clinicians in this Medicare group
NPI 1487152104 (877) 307-3226
Oak Medical Sc
3.7 mi
Internal Medicine
N20W22961 WATERTOWN RD
Waukesha, WI 53186
  • Reassigned Medicare billing, Wisconsin enrollment
  • 191 clinicians in this Medicare group
NPI 1669910345 (262) 875-5070
Milwaukee Internal Medicine Associates Inc
13 mi
Multi-Specialty
7733 W BURLEIGH ST
Milwaukee, WI 53222
  • Reassigned Medicare billing, Wisconsin enrollment
  • 20 clinicians in this Medicare group
NPI 1457531345 (414) 837-6300
Signify Health Medical Associates, PLLC
838 mi
General Practice
4055 VALLEY VIEW LN STE 700
Dallas, TX 75244
  • Reassigned Medicare billing, Wisconsin enrollment
  • 303 clinicians in this Medicare group
NPI 1750845863 (972) 715-3800

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
423 services71 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
77 services42 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
57 services56 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes 99307
A follow-up nursing facility visit per day typically lasts about 10 minutes. This service involves a healthcare professional checking on your health status, answering any questions you may have, and monitoring your progress. This routine check ensures your recovery is on track and any concerns are addressed promptly.
21 services14 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
16 services16 patients
X-ray of chest, 2 views 71046
A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.
14 services13 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Waukesha Memorial Hospital

Acute Care Hospitals · Waukesha, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520008
Location725 American AveWaukesha, WI 53188 · Waukesha County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53188 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$82.92 typical visit price
range $53.90 – $163.24
Typical copayment $20.73 (range $13.47 – $40.81)
Most-billed visit code 99203
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. NATASHA JEAN PINKERTON LCSW
Social Worker (Clinical)
725 AMERICAN AVE
WAUKESHA, WI 53188
Waukesha County (262) 928-1000
DR. FRANCISCO PEREZ M.D.
Anesthesiology
725 AMERICAN AVE
WAUKESHA, WI 53188
Waukesha County (262) 544-2011
ANNETTE QUINN NP
Nurse Practitioner (Obstetrics & Gynecology)
725 AMERICAN AVE, PROHEALTH CARE WOMEN'S CENTER
WAUKESHA, WI 53188
Waukesha County (262) 928-3500
ELIZABETH ROSE LEMM PA-C
Physician Assistant
725 AMERICAN AVE
WAUKESHA, WI 53188
Waukesha County (262) 928-1000
DR. JASON GEORGE ULRICHS M.D.
Anesthesiology
725 AMERICAN AVE
WAUKESHA, WI 53188
Waukesha County (262) 787-6700
DAWN MICHELLE GOODREAU NNP-BC, APNP
Nurse Practitioner (Neonatal)
725 AMERICAN AVE
WAUKESHA, WI 53188
Waukesha County (210) 685-0887
DR. ALYSSA JELINEK
Nurse Practitioner (Neonatal)
725 AMERICAN AVE
WAUKESHA, WI 53188
Waukesha County (262) 928-1000
TIFFANY BOWDEN PA
Physician Assistant
725 AMERICAN AVE
WAUKESHA, WI 53188
Waukesha County (262) 928-1000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nathaniel Fagan-duerr's NPI number?

The NPI number for Nathaniel Fagan-duerr is 1548854755. It was assigned to this individual provider in the NPPES registry on February 28, 2021.

Where is Nathaniel Fagan-duerr located?

Nathaniel Fagan-duerr practices at 725 American Ave, Waukesha, WI 53188. The listed phone number is (262) 928-1000.

What is Nathaniel Fagan-duerr's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Nathaniel Fagan-duerr enrolled in Medicare?

Yes. Nathaniel Fagan-duerr is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Nathaniel Fagan-duerr's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Fagan-duerr reassigns Medicare benefits to 5 organizations: Prohealth Medical Group Inc (Waukesha, WI), Maple Medical Sc (Waukesha, WI), Oak Medical Sc (Waukesha, WI), Milwaukee Internal Medicine Associates Inc (Milwaukee, WI) and Signify Health Medical Associates, PLLC (Dallas, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nathaniel Fagan-duerr's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nathaniel Fagan-duerr accept?

Health plans from Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), Security Health Plan and UnitedHealthcare list Nathaniel Fagan-duerr as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Nathaniel Fagan-duerr affiliated with any hospitals?

According to CMS data, Nathaniel Fagan-duerr is affiliated with Waukesha Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Nathaniel Fagan-duerr was last updated on November 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.