About Us

Who We Are

Bishop Medical Group is innovative outpatient psychiatry and mental health treatment designed to get the results you need.

We offer a comprehensive array of outpatient treatments and psychiatry services, using an individualized approach with flexible options.

Our Team

Bishop Medical Group is made up of Supportive, Trustworthy and Knowledgeable providers who go above and beyond to treat the whole you.

Meet The People You Will Be Working With

Dr. Jonathan C Fellers


Dr. Fellers has joined Bishop Medical Group to spearhead our Ketamine Infusion program. Dr. Fellers got a degree in chemistry at MIT, studied at Cornell University for Medical School and completed his residency at the University of Virginia. He underwent his Addiction Psychiatry Fellowship at the University of Oregon. He is an addiction psychiatrist who works with patients, families and the health care system to promote high quality treatment in both mental health and addiction. With his holistic approach to medicine he is able to find comfortable and effective solutions for everyone.


  • Addiction Psychiatry

  • Addiction Medicine

Dr. Tim Carnes


Dr. Carnes attended Yale University for his undergraduate degree and went to Rochester School of Medicine in New York for Medical School. After graduating he returned home to Maine for his residency at Maine Medical Center. He is a member of the American Society of Addiction Medicine and is board-certified in Addiction Medicine through the American Board of Preventative Medicine. He strives to create a culture of superb medical care in an approachable, compassionate manner, treating patients with kindness, skill and respect. he is grateful to be a part of Bishop Medical Group providing high quality, evidence based medical care to the patients he has the opportunity to serve.


  • Addiction Treatment

  • Medication for Addiction Treatment (MAT)

Ali Tetrault


Ali is a Board Certified Psychiatric Mental Health Nurse Practitioner. (PMHNP) Ali has a decade of nursing experience to precede her transition to the NP role with several years in behavioral health and the treatment of substance use disorders. Ali’s NP training and current work has focused on working with an array of mental health disorders with Assertive Community Treatment Teams as well as outpatient medication management treatment of schizophrenia spectrum disorders and post traumatic stress disorder. Ali is excited to be part of Bishop Medical Group to help people restart their road to recovery.


  • Psychiatric Nurse Practitioner

  • Anxiety

  • Depression

Gabrielle Bowker


Gabrielle is a board-certified family nurse practitioner who specializes in addiction medicine. She completed her Bachelors of Science in Nursing and the University of Maine in 2011, and obtained her Master of Science in Nursing from Saint Joseph’s College of Maine in 2019. She holds a national certification with the American Academy of Nurse Practitioners.

Start Your Journey Today

Give us a call to schedule your appointment

Sign up for our Newsletter

Thank you for your message. It has been sent.
There was an error trying to send your message. Please try again later.

(We do not share your data with anybody, and only use it for its intended purpose)

Give us a call


Send us an email


Speak With Our Treatment Team

Thank you for your message. It has been sent.
There was an error trying to send your message. Please try again later.