5
14 Ratings with 14 written Reviews
Summary
Dr. William Tillis treats breathing problems, chronic lung disease, and COPD, and performs pulmonary function testing, bronchodilator reversibility testing, and asthma challenge tests. He practices pulmonology and has 40 years of experience, with an affiliation with OSF Saint Francis Medical Center.
Dr. Tillis is board-certified in internal medicine through the American Board of Internal Medicine. He earned his medical degree from the University of Illinois College of Medicine in Chicago and completed a fellowship at the University of Texas at San Antonio in 1993. He sees patients in Janesville and Lake Geneva, Wisconsin. Patients on Vitals rate Dr. Tillis 5 out of 5.
Dr. Tillis is board-certified in internal medicine through the American Board of Internal Medicine. He earned his medical degree from the University of Illinois College of Medicine in Chicago and completed a fellowship at the University of Texas at San Antonio in 1993. He sees patients in Janesville and Lake Geneva, Wisconsin. Patients on Vitals rate Dr. Tillis 5 out of 5.
Overview based on verified provider data
Quick Facts
- accepting new patients
- 40 years of experience
- 15 insurance plans accepted
- speaks English
- University Of Texas At San Antonio
- 14 written reviews
- 1 award
- 1 specialty
- 11 areas of expertise
- 1 board certification
- 1 hospital affiliation
- 2 office locations
- Male
Awards
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Office Locations
William P. Tillis has 2 locationsMercyhealth Lung Center–Janesville
903 Mineral Point Ave.Janesville, WI 53548 Tel: (608) 752-6255
Mon8:30 am - 7:00 pm
Tue8:30 am - 5:00 pm
Wed8:30 am - 5:30 pm
Thu8:30 am - 3:30 pm
Fri9:00 am - 3:00 pm
SatClosed
SunClosed
Mercyhealth Lung Center–Walworth
N2950 State Road 67Lake Geneva, WI 53147 Tel: (262) 245-8261
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
 |  |  |  |
| William P. Tillis, MD | Joseph Kittah, MD | Hazen "jay" H. Tuck Jr., MD | Tabassum Nafsi |
| Pulmonology | Pulmonology | Pulmonology | Pulmonology |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | Accepts New Patients |
| 40 Years of Experience | 25 Years of Experience | ||
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English | Speaks English | Speaks English | Speaks English |
| Janesville , WI | Beloit , WI | Janesville , WI | Beloit , WI |
| Med School: University of Illinois College of Medicine at Rockford | Med School: University of Ghana School of Medicine and Dentistry | Med School: M,B,B.S Baqai Medical & Dental College, Karachi, Pakistan | |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by William P. Tillis
Medical Specialties
William P. Tillis has the following specialty
Specialty Expertise
William P. Tillis has the following 11 areas of expertise
Certifications, License, & Education
40 Years Experience
William P. Tillis holds active and expired medical licenses in the states of Wisconsin and Illinois. They are board certified in Internal medicine by the American Board of Internal Medicine.
Board Certifications
Board certified in Internal medicine by the American Board of Internal Medicine.
Medical License
Medical Doctor with an active medical license in the state of Wisconsin that expires in 2027 and an expired medical license in the state of Illinois that expired in 2026.
Education & Training
Fellowship
Completed their fellowship at University Of Texas At San Antonio in 1993.
Residency
Completed their residency at University of Arkansas for Medical Sciences Regional Centers (South Central) Program, Univ Hosp-S Tx Med Ctr, Pulmonary Diseases; Univ Hosp-S Tx Med Ctr, Internal Medicine, University Of Texas At San Antonio in 1989, and University Of Texas At San Antonio in 1986.
Medical School
Graduated from University of Illinois College of Medicine at Rockford, University Of Il Coll Of Med- Chicago Il in 1986, and University of Illinois College of Medicine in 1986.
NPI Number
William P. Tillis' NPI number is 1669468377.
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Frequently Asked Questions
- Where is William Tillis's office located?
- William Tillis's office is located at 903 Mineral Point Ave., Janesville, WI, 53548.
- Which hospitals is William Tillis affiliated with?
- William Tillis is affiliated with Osf Saint Francis Medical Center.
- How can I make an appointment with William Tillis?
- You can find contact information for William Tillis here on Vitals.
- Does William Tillis accept my insurance?
- You can see the insurance plans that William Tillis accepts on their Vitals profile.
- Does William Tillis accept virtual/telehealth appointments?
- William Tillis has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Board certification bodies (such as ABMS)
- Healthcare system and provider network data
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