DR. MONICA M O'SULLIVAN MD
NPI 1043262546
Internal Medicine in West Allis, WI

Q: What is Monica O'sullivan's NPI number?

The NPI number for Monica O'sullivan is 1043262546. It was assigned to this individual provider in the NPPES registry on May 16, 2006. The provider is also known as Dr. Monica M Ziebert MD.

Q: What is Monica O'sullivan's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Monica O'sullivan was last updated on September 9, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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 May 16, 2006PECOS Enrolled

11211 W LINCOLN AVE, WEST ALLIS, WI 53227(414) 454-8300(414) 327-1450 Get Directions Write a Review

NPPES record last updated: September 9, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Monica M O'sullivan Md NPPES

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

DR. MONICA M O'SULLIVAN MD (NPI 1043262546) is an individual internal medicine provider in West Allis, Wisconsin, licensed in Wisconsin (44298) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1043262546

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. MONICA M O'SULLIVANCredential: MD

Location Address11211 W LINCOLN AVEWest Allis, WI 53227-1035

Mailing Address11211 W Lincoln AveWest Allis, WI 53227-1035 · (414) 454-8300 · Fax (414) 327-1450

Phone(414) 454-8300

Fax(414) 327-1450

Sole ProprietorNo

Enumeration DateMay 16, 2006

Last NPPES UpdateSeptember 9, 2021

NPPES CertifiedSeptember 9, 2021

✔ NPI 1043262546 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in WI · 44298

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

11211 W LINCOLN AVE, West Allis, WI 53227

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Other Names 1

Former Name (1)Dr. Monica M Ziebert Md

Other Identifiers 3

Medicaid34193700WI

Other004000261VHumana

Medicaid1043262546WI

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Monica M O'sullivan Md 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.

Medicare Billing Reassignments

Medicare enrollment records show Monica O'sullivan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Medical College Of Wisconsin, Inc.

3.3 mi

Internal Medicine

8701 WATERTOWN PLANK RD
Milwaukee, WI 53226

Reassigned Medicare billing, Wisconsin enrollment
3,983 clinicians in this Medicare group

NPI 1699720086 (414) 955-7101

Froedtert & the Medical College Of Wisconsin Community Physicians, Inc.

12 mi

Internal Medicine

W180N8000 TOWN HALL RD
Menomonee Falls, WI 53051

Reassigned Medicare billing, Wisconsin enrollment
2,294 clinicians in this Medicare group

NPI 1568787448 (262) 255-2500

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53227 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

$123.69 typical visit price

range $53.90 – $163.24

Typical copayment $30.92 (range $13.47 – $40.81)

Most-billed visit code 99204

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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

17 suppliers30 claims90 services$5.65 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

9 suppliers17 claims24 services$0.94 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 15

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

DR. TYSHUNDA LAKESHA MANNING MD

Obstetrics & Gynecology