NPPES file of Aug 9, 2026

Alexandra Diersen, FNP-C

Family Nurse Practitioner · Milwaukee, WI

Alexandra Diersen, FNP-C is a family nurse practitioner with a practice address in Milwaukee, Wisconsin, and NPI 1417836396, issued on Aug 27, 2025. Check the license (Wisconsin 17382-33, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1417836396
Name
Alexandra Diersen
Credential
FNP-C
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License numbers
17382-33 WI
164167 IA
Self-reported in NPPES; status is on the state search
Practice location
2400 W Villard Ave, Milwaukee, WI 53209
Phone
(414) 527-8191
Enumerated
Aug 27, 2025
Record last updated
Nov 13, 2025
Medicare enrollment
Enrolled (PECOS I20251121000354); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 2,814 in Wisconsin → Look up another NPI →

Also registered at 2400 W Villard Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Hassan Ahmed, MDStudent in an Organized Health Care Education/Training Program1386438398
  2. Mir Mahboob Ali, MDStudent in an Organized Health Care Education/Training Program1457291874
  3. Sabrina Ali, MDFamily Medicine Physician1497334460
  4. Oluwafemi Aremu, MDFamily Medicine Physician1194567966
  5. Courtney Barry, PSYDClinical Psychologist1487183240
  6. Rebecca Bernstein, M.D.Family Medicine Physician1184859316

Verify Alexandra Diersen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
    Search for license 17382-33    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Wisconsin license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Ascension Medical Group-Southeast Wisconsin IncMount Pleasant, WI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Alexandra Diersen among 2,814 family nurse practitioner records in Wisconsin

Alexandra Diersen, 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 2025, is newer than 90% of them.

  • NPI issued2025 · 90% of these records are older, 4% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2024 · 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).

458 family nurse practitioner records list a practice address in Milwaukee

They are 458 of the 18,389 NPPES records with a practice address in Milwaukee, and 2,814 family nurse practitioner records in Wisconsin.

All 2,814 in Wisconsin → Every provider in Milwaukee → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Laura Mesenbrink, APNPMilwaukee, WI 532091346486768
  2. Nicole Owens, APNPGlendale, WI 532091508797648
  3. Kenya Robertson, FNP-BCMilwaukee, WI 532091356629851
  4. Barbara Tong, FNP-CMilwaukee, WI 532091508604786
  5. Aditi AdhikariMilwaukee, WI 532101346956422
  6. Sonja Araoz, APNPMilwaukee, WI 532101396371910
  7. Kelley Beltran, FNPMilwaukee, WI 532081063949600
  8. Tricia Brunmeier, N.P.Milwaukee, WI 532101104202753

Common questions

What is Alexandra Diersen, FNP-C's NPI number?

Alexandra Diersen, FNP-C's National Provider Identifier (NPI) is 1417836396, issued on Aug 27, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Alexandra Diersen, FNP-C located?

The NPPES record lists a practice address at 2400 W Villard Ave, Milwaukee, WI, 53209. Phone: (414) 527-8191. Providers update this record themselves, so call before visiting.

How can I verify Alexandra Diersen, FNP-C's license?

NPPES lists Wisconsin license number 17382-33, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.