William G Matthaeus, MD - Medicare Hematology/oncology in Milwaukee, WI

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William G Matthaeus, MD is a medicare enrolled "Internal Medicine - Hematology & Oncology" physician in Milwaukee, Wisconsin. He went to Medical College Of Wisconsin and graduated in 1983 and has 41 years of diverse experience with area of expertise as Hematology/oncology. He is a member of the group practice Aurora Advanced Healthcare Inc, Aurora Health Care Metro Inc and his current practice location is 1055 N Mayfair Rd, Milwaukee, Wisconsin. You can reach out to his office (for appointments etc.) via phone at (262) 857-5750.

William G Matthaeus is licensed to practice in Wisconsin (license number 25992) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1326039074.

Contact Information

William G Matthaeus, MD
1055 N Mayfair Rd,
Milwaukee, WI 53226-3436
(262) 857-5750
Not Available

Map and Direction




Physician's Profile

Full NameWilliam G Matthaeus
GenderMale
SpecialityHematology/oncology
Experience41 Years
Location1055 N Mayfair Rd, Milwaukee, Wisconsin
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William G Matthaeus attended and graduated from Medical College Of Wisconsin in 1983
  NPI Data:
  • NPI Number: 1326039074
  • Provider Enumeration Date: 11/02/2005
  • Last Update Date: 01/15/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 0749181691
  • Enrollment ID: I20040923000223

Medical Identifiers

Medical identifiers for William G Matthaeus such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1326039074NPI-NPPES
P00823727OtherWIRR MEDICARE
30850600MedicaidWI

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RH0003XInternal Medicine - Hematology & Oncology 25992 (Wisconsin)Primary
207RH0002XInternal Medicine - Hospice And Palliative Medicine 25992 (Wisconsin)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Aurora At HomeWauwatosa, WIHospice
Aurora St Lukes Medical CenterMilwaukee, WIHospital
West Allis Memorial HospitalWest allis, WIHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Aurora Advanced Healthcare Inc3375625833928
Aurora Health Care Metro Inc862898653660

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. William G Matthaeus allows following entities to bill medicare on his behalf.
Entity NameAurora Medical Group, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1427271378
PECOS PAC ID: 6709794258
Enrollment ID: O20031105000725
Entity NameAurora Health Care Metro Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1861447179
PECOS PAC ID: 8628986536
Enrollment ID: O20040114000498
Entity NameAurora Health Care Central, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1922053107
PECOS PAC ID: 4688583677
Enrollment ID: O20040308000588
Entity NameBaycare Aurora Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1255387726
PECOS PAC ID: 0244130557
Enrollment ID: O20051012000579
Entity NameAurora Advanced Healthcare Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265629133
PECOS PAC ID: 3375625833
Enrollment ID: O20080123000694

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William G Matthaeus is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
William G Matthaeus, MD
3003 W Good Hope Rd,
Milwaukee, WI 53209-2042

Ph: (414) 352-3100		William G Matthaeus, MD
1055 N Mayfair Rd,
Milwaukee, WI 53226-3436

Ph: (262) 857-5750

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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