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WILLIAM G MATTHAEUS MD
NPI 1326039074
Internal Medicine - Hematology & Oncology in Milwaukee, WI

Active since November 02, 2005PECOS EnrolledAccepts Medicare Assignment
1055 N MAYFAIR RD, MILWAUKEE, WI 53226(262) 857-5750 Get Directions Write a Review

NPPES record last updated: September 24, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 24, 2024, Dec 2, 2021 (2 updates tracked since 2021).

About William G Matthaeus Md NPPES

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

WILLIAM G MATTHAEUS MD (NPI 1326039074) is an individual hematology & oncology provider in Milwaukee, Wisconsin, licensed in Wisconsin (25992) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Aurora Health Care Central Inc, and is a graduate of Medical College Of Wisconsin (1983).

NPPES Registry Identity

NPI1326039074
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameWILLIAM G MATTHAEUSCredential: MD
Location Address1055 N MAYFAIR RDMilwaukee, WI 53226-3436
Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250
Phone(262) 857-5750
Sole ProprietorNo
Medical School CMSMedical College Of WisconsinGraduated 1983
Enumeration DateNovember 2, 2005
Last NPPES UpdateSeptember 24, 20242 updates tracked since enumeration
NPPES CertifiedSeptember 24, 2024
✔ NPI 1326039074 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in WI · 25992
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal Medicine · Hospice and Palliative MedicineTaxonomy 207RH0002X · License 25992 (WI)
1055 N MAYFAIR RD, Milwaukee, WI 53226
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Other Identifiers 2

Medicaid30850600WI
OtherP00823727WI · Rr Medicare

Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William G Matthaeus Md 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 ID749181691
PECOS Enrollment IDI20040923000223
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.

Areas of Expertise CMS Part B claims 7

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
247 services112 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
149 services37 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.
120 services97 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
28 services28 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
21 services17 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
15 services12 patients

Hospital Affiliations CMS Care Compare 3

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

Aurora Health Care Central Inc

Acute Care Hospitals · Sheboygan, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520035
Location3400 Union AveSheboygan, WI 53081 · Sheboygan County
Emergency services Birthing friendly

Aurora St Lukes Medical Center

Acute Care Hospitals · Milwaukee, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520138
Location2900 W Oklahoma AveMilwaukee, WI 53215 · Milwaukee County
Emergency services Birthing friendly

West Allis Memorial Hospital

Acute Care Hospitals · West Allis, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520139
Location8901 W Lincoln AveWest Allis, WI 53227 · Milwaukee County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53226 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
$163.24 typical visit price
range $53.90 – $163.24
Typical copayment $40.81 (range $13.47 – $40.81)
Most-billed visit code 99205
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 18

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

ONCOLOGY ALLIANCE
Non-Pharmacy Dispensing Site
1055 N MAYFAIR RD
WAUWATOSA, WI 53226
Milwaukee County (414) 479-8450
DR. SARDAR KHAN MD
Family Medicine
1055 N MAYFAIR RD
WAUWATOSA, WI 53226
Milwaukee County (414) 479-2300
DANIEL MOLINARO DO
Family Medicine
1055 N MAYFAIR RD
WAUWATOSA, WI 53226
Milwaukee County (414) 476-8450
SAVAN PANCHAL MD
Family Medicine
1055 N MAYFAIR RD
WAUWATOSA, WI 53226
Milwaukee County (414) 479-2300
KHYATI SONI D.O.
Family Medicine
1055 N MAYFAIR RD
WAUWATOSA, WI 53226
Milwaukee County (414) 479-2300
SARA J NOLAN MD
Family Medicine
1055 N MAYFAIR RD
WAUWATOSA, WI 53226
Milwaukee County (414) 476-8450
AURORA PHARMACY INC.
Pharmacy
1055 N MAYFAIR RD, SUITE 100
MILWAUKEE, WI 53226
Milwaukee County (414) 479-2500
JOHN T HAMBROOK MD
Pediatrics (Pediatric Cardiology)
1055 N MAYFAIR RD
WAUWATOSA, WI 53226
Milwaukee County (414) 479-2300

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 William Matthaeus's NPI number?

The NPI number for William Matthaeus is 1326039074. It was assigned to this individual provider in the NPPES registry on November 2, 2005.

Where is William Matthaeus located?

William Matthaeus practices at 1055 N Mayfair Rd, Milwaukee, WI 53226. The listed phone number is (262) 857-5750.

What is William Matthaeus's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is William Matthaeus enrolled in Medicare?

Yes. William Matthaeus 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.

What insurance does William Matthaeus accept?

Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare), HealthPartners and Quartz and 1 other insurer list William Matthaeus 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 William Matthaeus affiliated with any hospitals?

According to CMS data, William Matthaeus is affiliated with Aurora Health Care Central Inc, Aurora St Lukes Medical Center and West Allis Memorial Hospital.

When was this NPI record last updated?

The NPPES record for William Matthaeus was last updated on September 24, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.