William P. Tillis, MD
5.0(5 reviews)
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Office Hours at Mercyhealth Lung Center–Janesville

  • Mon:8:30am - 7:00pm
  • Tue:8:30am - 5:00pm
  • Wed:8:30am - 5:30pm
  • Thu:8:30am - 3:30pm
  • Fri:9:00am - 3:00pm

William P. Tillis, MD
Internal Medicine Physician - Pulmonary Disease

Highlights

  • Board Certified

Biography

It is a privilege to provide the best available care to the patients I serve. I strive to provide personalized care based on the latest knowledge and research to each unique person I see.

Featured Review See More Reviews

I would definitely recommend Dr Tillis to others…

Anonymous

Summary

Provider Training

UniversityDegreeFocusGraduated
University of Illinois College of Medicine at RockfordMedical DegreeNot Specified
University Of Il College of Medicine- Chicago IlOther Degree1986
University of Illinois College of MedicineMedical Degree1986

InstitutionFocusYear
Residency - University Hospital-S Tx Medical Center, Pulmonary Diseases; University Hospital-S Tx Medical Center, Internal MedicineNot Specified
Internship - University Of Texas At San Antonio1986
Residency - University Of Texas At San Antonio1989
Fellowship - University Of Texas At San Antonio1993
Residency - University of Arkansas for Medical Sciences Regional Centers (South Central) Program Not Specified

CertificationCert. BodyYear
Internal medicine
Sub-Specialty: Critical Care Medicine		Internal MedicineNot Specified

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Provider Profile 0

Specialties

Languages Spoken
English
Medical Specialties
  • Internal Medicine Physician - Sub-Specialty: Pulmonary Disease

Internal Medicine

Accepts New Patients: Yes

Payment Options

Payment Details

Reviews

Average Rating: 5.0
Number of Reviews: 5
Most Recent Review: 10/22/2026
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Office & Staff Evaluation Not rated

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Office Appearance & Atmosphere Not rated
Handling of Billing Matters Not rated
Average Wait Time Not Rated

Provider Evaluation 5.0

Listening Skills 5.0
Clear Explanations 5.0
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Verified Patient

“I would definitely recommend Dr ...”

I would definitely recommend Dr Tillis to others

Anonymous 10/22/2026
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Verified Patient

“Dr. Tillis was very thorough and...”

Dr. Tillis was very thorough and took his time to explain the details to us. We never felt rushed and he was so caring to make sure that we understood what we were seeing on the images of the Pet Scan

Anonymous 01/06/2026
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Verified Patient

“Dr. Tillis is Great...”

Dr. Tillis is Great

Anonymous 07/02/2025
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Verified Patient

“Dr. Tillis was very good about e...”

Dr. Tillis was very good about explaining everything.

Anonymous 09/02/2026
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Verified Patient

“Dr Tillis is great! Super knowle...”

Dr Tillis is great! Super knowledgeable and very understanding of my situation. Very down to earth person.

Anonymous 08/28/2025

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Hazen "Jay" Tuck, MD   -   Internal Medicine Physician
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Procedures & Services

Procedures & Treatments Offered

    Commonly Prescribed Medications

    William P. Tillis, MD has not yet listed the medications that he commonly prescribes.

    Accepted Insurance

    Accepted Insurance

    William P. Tillis, MD has not yet specified the insurance plans he accepts.