Kathleen E. Mosentine, MD

Kathleen E. Mosentine, MD

Medical Director

Dr. Kathleen E. Mosentine is a Board Certified Addictionologist, who has spent many years working in the Internal Medicine outpatient and inpatient world. She says, “There are so any terrible sequelae that stem from substance use disorders. Ramifications from tobacco abuse, heart infections in young people, end-stage liver disease, withdrawal DT’s, and on and on. It seemed and seems insane that the majority of the life-threatening diseases we treat have had essentially no appropriate follow-up to treat the actual SUD which caused the physical ailments.”

In 2017, Dr. Mosentine worked at the Southside Methadone Clinic in Grand Rapids and loved it. She was moved by seeing broken people start to get their lives back. Women reconnecting with their children, folks getting jobs, and repaired or new relationships being born.

As Medical Director, Dr. Mosentine’s responsibilities include overseeing all medical practices, coordination of clinical and medical practices, maintaining and improving quality of care, and supporting the medical team for both residential and outpatient addiction treatment programs.

In her free time, Dr. Mosentine loves being a parent to 20-year-old twins. She enjoys music, and pre-COVID, she sang in the church choir. She also plays piano, flute and recently took up oboe (with self-described varying success). She loves baking- especially the really fattening things, jigsaw puzzles, dogs (the family has 3), playing euchre, and gardening (roses and most flowers).

Dr. Mosentine says, “I love all Winston Churchill quotes but this is one that I met during my darkest hour, ‘The real miscalculation we make with adversity is in our ability to adapt’. I believe it completely.”


Michigan Medical, PC 19942010 

  • 19942002 Private Practice 
  • 20022007 Kent Community Hospital (KCH) working Nursing Home and SAR 
  • 20052007 KCH Medical Director of Nursing Home and SAR 
  • 20072010 Hospitalist at Butterworth and Blodgett 
  • 2010-2018 Blodgett was acquired by Spectrum and continued hospitalist work
  • 2018-2019 Southside Methadone Clinic (Cherry Health)
  • On Spectrum Steering committee for Opioid Crisis (2017 through 2020)
  • Assisted with Capstone project for Spectrum Executives going through MBA program on Addiction 2018.
  • Assisted with teaching medical students addiction issues annually


19911994 Saint Marys/Blodgett Hospital 

Internal Medicine Residency Grand Rapids, Mi 

1990-1991 Saginaw General Hospital 

Family Practice Program completed 1 year 

19861990 Michigan State University 

College of Human Medicine 

19851986 University of Michigan 

School of Public Health completed one year graduate school in toxicology

19811985 Albion College 

BA in Biology 


Beta Beta Beta (Biology Honors) Alpha Lambda Delta (Freshman Womens Honors

Butterworth Attending of the Month Award 


Summer 1987 –  Participated in the MSU Summer Biomedical Research Forum. Worked with Dr. Rachel Fisher on the relationship between Maternal Serum Alpha Fetoprotein and Albumin 

Winter Semester 1985 – Researched effect of toxic chemicals on the dermis and epidermis while in the toxicology program at University of Michigan