ALEXANDRA DIERSEN FNP-C
NPI 1417836396
Nurse Practitioner - Family in Milwaukee, WI
About Alexandra Diersen Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDRA DIERSEN FNP-C (NPI 1417836396) is an individual family provider in Milwaukee, Wisconsin, licensed in Wisconsin (17382-33) and active in the NPI registry since August 2025. She is enrolled in Medicare PECOS, is affiliated with Ascension All Saints Hospital, and is a graduate of Other (2024).
NPPES Registry Identity
Specialties & Licenses 2
Accepted 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
Alexandra Diersen 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.
Medicare Billing Reassignment
Medicare enrollment records show Alexandra Diersen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Glendale, WI 53212
- Reassigned Medicare billing, Wisconsin enrollment
- 1,343 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension All Saints Hospital
Acute Care Hospitals · Racine, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53209 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
MILWAUKEE, WI 53209
MILWAUKEE, WI 53209
MILWAUKEE, WI 53209
MILWAUKEE, WI 53209
MILWAUKEE, WI 53209
MILWAUKEE, WI 53209
MILWAUKEE, WI 53209
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 Alexandra Diersen's NPI number?
The NPI number for Alexandra Diersen is 1417836396. It was assigned to this individual provider in the NPPES registry on August 27, 2025.
Where is Alexandra Diersen located?
Alexandra Diersen practices at 2400 W Villard Ave, Milwaukee, WI 53209. The listed phone number is (414) 527-8191.
What is Alexandra Diersen's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Alexandra Diersen enrolled in Medicare?
Yes. Alexandra Diersen 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 organization bills Medicare for Alexandra Diersen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Diersen reassigns Medicare benefits to Ascension Medical Group-Southeast Wisconsin Inc (Glendale, WI). The 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 Alexandra Diersen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alexandra Diersen accept?
Health plans from Anthem Blue Cross and Blue Shield list Alexandra Diersen 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 Alexandra Diersen affiliated with any hospitals?
According to CMS data, Alexandra Diersen is affiliated with Ascension All Saints Hospital.
When was this NPI record last updated?
The NPPES record for Alexandra Diersen was last updated on November 13, 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.
# Alexandra Diersen, FNP-C · NPI 1417836396
Family physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since August 27, 2025.
## Identity
- **NPI:** 1417836396 (Entity type: Individual)
- **Enumerated:** August 27, 2025
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 17382-33 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 2400 W VILLARD AVE, Milwaukee, WI 53209-4901
- **Phone:** (414) 527-8191
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Ascension Medical Group-Southeast Wisconsin Inc (NPI 1609881077, Glendale, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** November 13, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1417836396) · Data from the CMS NPPES public registry.