Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MRS. ANN ELIZABETH WITTWER NP
NPI 1598769911
Nurse Practitioner - Adult Health in Milwaukee, WI

Q: What is Ann Wittwer's NPI number?

The NPI number for Ann Wittwer is 1598769911. It was assigned to this individual provider in the NPPES registry on June 13, 2005.

Q: What is Ann Wittwer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Q: When was this NPI record last updated?

The NPPES record for Ann Wittwer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days 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.

Active since June 13, 2005PECOS Enrolled

5000 WEST NATIONAL AVE, YELLOW CLINIC, MILWAUKEE, WI 53295(414) 384-2000(414) 398-4198 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Mrs. Ann Elizabeth Wittwer Np NPPES

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

MRS. ANN ELIZABETH WITTWER NP (NPI 1598769911) is an individual adult health provider in Milwaukee, Wisconsin, licensed in Wisconsin (1836-033) and active in the NPI registry since June 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1598769911

Entity TypeIndividualFemale

Primary Taxonomy363LA2200X

Provider Legal NameMRS. ANN ELIZABETH WITTWERCredential: NP

Location Address5000 WEST NATIONAL AVE, YELLOW CLINICMilwaukee, WI 53295

Mailing Address5000 W National AveMilwaukee, WI 53295-0001 · (414) 384-2000 · Fax (414) 398-4198

Phone(414) 384-2000

Fax(414) 398-4198

Sole ProprietorNo

Enumeration DateJune 13, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1598769911 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LA2200X

License✔ Licensed in WI · 1836-033

5000 WEST NATIONAL AVE, Milwaukee, WI 53295

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mrs. Ann Elizabeth Wittwer Np is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53295 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 2

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

MR. AUGUSTUS ALEXANDER A.T.

Counselor (Addiction (Substance Use Disorder))

5000 WEST NATIONAL AVE
MILWAUKEE, WI 53295

Milwaukee County (414) 384-2000

MRS. CATHERINE VERONICA DE YOUNG BSW

Social Worker (Clinical)

5000 WEST NATIONAL AVE, VA MILWAUKEE
MILWAUKEE, WI 53295

Milwaukee County (414) 384-2000

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 Ann Wittwer's NPI number?

The NPI number for Ann Wittwer is 1598769911. It was assigned to this individual provider in the NPPES registry on June 13, 2005.

Where is Ann Wittwer located?

Ann Wittwer practices at 5000 West National Ave Yellow Clinic, Milwaukee, WI 53295. The listed phone number is (414) 384-2000.

What is Ann Wittwer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Ann Wittwer enrolled in Medicare?

Yes. Ann Wittwer is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ann Wittwer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days 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.