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William Decker, DO
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9 Patient Reviews
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William Decker, DO

Internal Medicine Physician - Pulmonary Disease, Internal Medicine Physician - Sleep Medicine

Biography

William Decker, DO is a Internal Medicine Physician - Pulmonary Disease, Internal Medicine Physician - Sleep Medicine practicing in Adrian, MI

He has not yet shared a personalized biography with Doctor… Read more ›

Featured Review See More Reviews

Dr Deckers care was life changing!…

Anonymous

Summary

Provider Training

UniversityDegreeFocusGraduated
Des Moines University College of Osteopathic Medicine and Health SciencesOther Degree1985
Des Moines University College of Osteopathic MedicineMedical Degree1985

InstitutionFocusYear
Residency - LECOMT/St John's Episcopal Hospital Program Not Specified
Residency - St Johns Health Sys/Oakland Hospital, Pulmonary Diseases; St Johns Health Sys/Oakland Hospital, Internal Medicine; St Johns Health Sys/Oakland Hospital, Flexible Or Transitional YearNot Specified

Photos

Provider Profile 0Provider Profile 1

Specialties

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

Years In Practice: 34 (started in 1992)

Accepts New Patients: Yes

Payment Options

Payment Details

Reviews

Average Rating: 5
Number of Reviews: 9
Most Recent Review: 01/04/2026
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Office & Staff Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Office Appearance & Atmosphere
Handling of Billing Matters Not rated
Average Wait Time Less than 5 minutes

Provider Evaluation

Accuracy of Diagnosis
Listening Skills
Clear Explanations
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Verified Patient

“Dr Deckers care was life changin...”

Dr Deckers care was life changing!

Anonymous 01/04/2026
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Verified Patient

“Excellent physician...”

Excellent physician

Anonymous 11/25/2025
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Verified Patient

“Dr Decker was very thorough, lis...”

Dr Decker was very thorough, listened to my concerns with no judgement. He is very compassionate and I could not have received better care. I have full confidence in him and I couldn't have went to a better Dr.

Anonymous 10/02/2025
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Verified Patient

“Have recommended to people and w...”

Have recommended to people and will continue to do so. Dr Decker is awesome and listens

Anonymous 09/09/2025
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“Patient”

My experience with Dr. Decker was nothing short of excellent. I was lucky to have him as my doctor. He is wonderful, compassionate, and brilliant. I had been to two doctors before finally seeing him, he diagnosed me on the first appointment. I recommend him to all of my family and friends. Original review on DoctorsDig.com

Anonymous 08/10/2012
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Verified Patient

“Dr. Decker is a very good doctor...”

Dr. Decker is a very good doctor. Treats you like family

Anonymous 12/05/2025
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Verified Patient

“Dr Decker always answers any que...”

Dr Decker always answers any questions I have.

Anonymous 10/17/2025
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Verified Patient

“All round doctor and staff, bee...”

All round doctor and staff, been with Dr Decker, 25 years, takes great care of me and my needs

Anonymous 10/02/2025
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Verified Patient

“Dr. Decker is one physician I wo...”

Dr. Decker is one physician I would recommend to anyone. He is very caring, and through.

Anonymous 06/22/2025

Locations

Affiliated Practices

Procedures & Services

Procedures & Treatments Offered

    Commonly Prescribed Medications

    William Decker, DO has not yet listed the medications that he commonly prescribes.

    Accepted Insurance

    Accepted Insurance

    William Decker, DO has not yet specified the insurance plans he accepts.
     

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