William Tillis

Individual provider Pulmonary Disease Physician · NPI 1669468377

William Tillis is registered under Pulmonary Disease in Lake Geneva, Wisconsin. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 1986, 40 years ago. Practices with Mercy Health System Corporation, a 751-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in Illinois, South Carolina and Wisconsin.

Years since qualifying: 40
Trained at: University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in: IL, SC, WI
In the registry since: 2005
Specialties on file: 3

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Practice location Address checks out

N2950 State Road 67
Lake Geneva, WI 53147-2655
Phone: (262) 245-0535
Fax: (262) 245-2248

Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

1001 Main St, Peoria, IL 61606-1907 — (309) 672-5682
1 Richland Medical Park Dr Ste 300, Columbia, SC 29203-6831 — (803) 545-5500
903 Mineral Point Ave, Janesville, WI 53548-2970 — (608) 752-6255
1000 Mineral Point Ave, Janesville, WI 53548-2982 — (608) 756-6868

Specialties & licences

Pulmonary Disease Physician (primary)	Taxonomy 207RP1001X · Licence 81911-20 (WI)
Pulmonary Disease Physician	Taxonomy 207RP1001X · Licence 83330 (SC)
Pulmonary Disease Physician	Taxonomy 207RP1001X · Licence 036085931 (IL)

Record details

NPI number	1669468377
Entity type	Individual (Type 1)
Gender	Male
Sole proprietor	No
NPI enumerated	September 27, 2005
Last updated in NPPES	September 14, 2023
Certification date	September 14, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialty	PULMONARY DISEASE
Also practises	INTERNAL MEDICINE
Medical school	UNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated	1986 (40 years in practice)
Group practice	Mercy Health System Corporation — 751 clinicians
Accepts Medicare assignment	Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients	113
Services billed	494 a service is one billed item, such as a visit, a test or a procedure
Average patient age	72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Mercy Health System Corp Hospital · Janesville, WI
Mercy Walworth Hospital & Medical Center Hospital · Lake Geneva, WI

Colleagues at Mercy Health System Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 751 clinicians in the practice; 12 are shown here.

Kerry A. Cates, PT Physical Therapist · Lake Geneva, WI
Dr. Eduardo Roberto Chavez Ruiz, MD Psychiatry Physician · Janesville, WI
Ellen Jean Ettlie, APNP Nurse Practitioner · Janesville, WI
Mrs. Kathryn K.o. Falso, PT Physical Therapist · Issaquah, WA
Jennifer J Gibson Chambers, DO Emergency Medical Services (Emergency Medicine) Physician · Janesville, WI
Mrs. Amanda Jean Johnson, PA-C Surgical Physician Assistant · Madison, WI
Dr. Masanosuke Ernest Kinoshita, MD Family Medicine Physician · Lake Geneva, WI
Jennifer L. Martin, APRN, DNP Adult Health Nurse Practitioner · Janesville, WI
John Patrick McCarthy, PA-C Physician Assistant · Rockford, IL
Dr. Kathleen Helen Miller, MD Emergency Medicine Physician · Janesville, WI
Dr. Steven Salisbury, MD Anatomic Pathology & Clinical Pathology Physician · Janesville, WI
Lisa A Wang, APRN, FNP Family Nurse Practitioner · Delavan, WI