William Tillis, - Medicare in Lake Geneva, WI

William Tillis, is a medicare enrolled "Internal Medicine - Pulmonary Disease" physician in Lake Geneva, Wisconsin. His current practice location is N2950 State Road 67, Lake Geneva, Wisconsin. You can reach out to his office (for appointments etc.) via phone at (262) 245-0535.

William Tillis is licensed to practice in Wisconsin (license number 81911-20) 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 1669468377.

Contact Information

William Tillis,
N2950 State Road 67,
Lake Geneva, WI 53147-2655
(262) 245-0535
(262) 245-2248

Map and Direction




Physician's Profile

Full NameWilliam Tillis
GenderMale
Speciality
Experience Years
LocationN2950 State Road 67, Lake Geneva, 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 Tillis attended and graduated from in
  NPI Data:
  • NPI Number: 1669468377
  • Provider Enumeration Date: 09/27/2005
  • Last Update Date: 09/14/2023
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for William Tillis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1669468377NPI-NPPES
036085931MedicaidIL
833307MedicaidSC

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RP1001XInternal Medicine - Pulmonary Disease 83330 (South Carolina)Secondary
207RP1001XInternal Medicine - Pulmonary Disease 81911-20 (Wisconsin)Primary
207RP1001XInternal Medicine - Pulmonary Disease 036085931 (Illinois)Secondary

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 Tillis 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 Tillis,
N2950 State Road 67,
Lake Geneva, WI 53147-2655

Ph: (262) 245-0535
William Tillis,
N2950 State Road 67,
Lake Geneva, WI 53147-2655

Ph: (262) 245-0535

Reviews and Comments


Internal Medicine Doctors in Lake Geneva, WI

Dr. Brian Jay Silverstein, MD
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Phone: 847-271-9609    
Nadiia Marenych, MD
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Phone: 262-249-5000    
Dr. Nestor C Alabarca, MD
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Medicare: Not Enrolled in Medicare
Practice Location: 146 E Geneva Square, Lake Geneva, WI 53147
Phone: 262-249-5000    Fax: 262-249-7142
Shashi Bhushan, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 146 E Geneva Sq, Lake Geneva, WI 53147
Phone: 262-549-5000    
Timothy J Thompson, MD
Pulmonary Disease
Medicare: Medicare Enrolled
Practice Location: N2950 State Road 67, Lake Geneva, WI 53147
Phone: 262-245-0535    Fax: 262-245-2248
Dr. Garth R Schneider, MD
Pulmonary Disease
Medicare: Not Enrolled in Medicare
Practice Location: 146 E Geneva Square, Lake Geneva, WI 53147
Phone: 262-249-5000    Fax: 262-249-7107

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).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.