Our trauma-focused care delves deeper than symptoms, working to uncover and address the root causes of mental health challenges.
Our evidence-based, holistic treatments integrate nutrition, mindfulness, and lifestyle changes alongside more traditional therapies.
From anxiety and depression to trauma recovery, we offer compassionate, tailored care to help you thrive.
Susan Finn, DNP, MN, APRN, PMHNP-C, CNL, Alumnus CCRN, is a compassionate and experienced Psychiatric Mental Health Nurse Practitioner dedicated to helping individuals achieve balance and wellness in their lives. With over 30 years of experience in critical care and emergency nursing, Susan brings a wealth of knowledge and understanding to her practice, Holistic Healing Psychiatry, PLLC.
A proud Montana native, Susan began her journey in nursing with a bachelor’s degree from Montana State University and later earned her master’s degree from the same institution. Her commitment to advancing mental health care led her to pursue a Doctorate in Nursing Practice at the University of Wyoming. Her career has been shaped by diverse experiences, including her time at a Level I Trauma Center, which deepened her expertise and compassion for trauma-informed care.
Susan specializes in treating depression, anxiety, PTSD, bipolar disorder, and other mental health challenges, with a strong emphasis on understanding the impact of trauma on overall well-being. She integrates both traditional and holistic approaches, offering services such as psychiatric medication management, tapering support, and advanced therapies like NeuroStar TMS therapy for treatment-resistant depression, SPRAVATO® (esketamine) therapy, and Accelerated Resolution Therapy (ART) for trauma, grief, and chronic pain.
Known for her patient-centered and trauma-informed approach, Susan is committed to creating a safe, supportive environment where individuals can feel empowered to explore their mental health and achieve lasting healing. She is proud to serve the communities of Montana and Wyoming, providing both in-person care at her Billings office and accessible telehealth services.
Outside of her professional work, Susan enjoys reading and doing crafts whenever she can. She loves traveling with her husband in their camper trailer, taking in the beauty of Montana and Wyoming, and cherishes spending time with their two adult sons whenever they’re in town.
At Holistic Healing Psychiatry, Susan Finn combines evidence-based practice with a deep understanding of the human condition, offering comprehensive care tailored to each individual’s unique needs.
Jeremy has also provided care in specialized settings including BioLife Plasma Services and Dialysis Clinic, Inc., further expanding his expertise in patient-centered treatment.
Known for his supportive and compassionate approach, Jeremy is dedicated to helping patients feel comfortable and cared for throughout their treatment journey. Outside of work, he enjoys hiking with his family, restoring cars, and working on home and yard projects.
Shelly Messmer is the TMS (Transcranial Magnetic Stimulation) treater and coordinator at Holistic Healing Psychiatry. In this role, she is passionate about supporting individuals seeking relief from Major Depressive Disorder (MDD).
Shelly approaches her work with deep empathy helping patients feel understood and supported throughout their healing journey. She takes great pride in being a part of the mental health recovery process and provides attentive, patient-centered care.
In previous roles, Shelly was acknowledged as having a reputation as a dedicated and highly dependable team player. Her former manager describes her as the “most caring individual she has ever know and that Shelly goes out of her way to make people feel seen and cared for.”
In her role at HHP, she will work closely with a board-certified psychiatric nurse practitioner to ensure a safe, supportive and therapeutic patient experience. She is dedicated to fostering understanding through clear, compassionate communication, guiding patients, answering their questions, and supporting them as they work toward mental wellness. Shelly is a
certified TMS treater and continues to stay updated on the latest treatment protocols to provide the highest quality of care possible.
She has recently assumed the Office Manager role and will ensure the smooth operation of the practice, supporting clinicians and staff by providing the resources needed to deliver high-quality client care and achieve the practice’s overall goals.
A lifelong resident of Billings, Montana, Shelly is actively involved in her church and deeply values time with her family. Her and her husband are the proud parents of five adult children and ten grandchildren, with whom they share a close and engaged relationship. Large family gatherings are among her greatest joys, and meaningful time together is always a priority.
We treat every individual with compassion and respect, providing personalized care that addresses not just symptoms, but the unique challenges and experiences that shape your mental health journey.
Specializing in PTSD, grief, and the long-term effects of trauma, we create a safe and nurturing space for healing.
Beyond traditional psychiatry, we embrace therapies and treatments designed to promote whole-body wellness.
Trained in multiple modalities, including Accelerated Resolution Therapy and programs addressing chronic pain, we treat conditions with a comprehensive perspective.
"I have been a patient of Susan Finn's for a few years now. She has treated me for both depression and anxiety, and I absolutely recommend her as both a therapist and a medication management expert. Susan is always upbeat and maintains a positive, welcoming attitude. She conducts a thorough interview at every visit, carefully reviewing how I've been doing since the last time we spoke.
She stays current with the latest therapies and approaches, which has been incredibly helpful in managing my mental health. Additionally, she is an expert in psychotropic medication management, ensuring that I receive the right medications and dosage to help me feel my best.
Her professionalism, expertise, and compassionate care have been a great support in my journey toward better mental health, and I’m truly grateful for her guidance."
"Susan Finn has been my clinical psychiatrist now for several years. She has always listened to my concerns attentively and has treated me with great care. When she told me she was opening her own practice I knew that there was no decision but to follow her in her new endeavors. I have struggled with bipolar disorder and panic disorder for much of my adult life. Until I started working with Susan I was in and out of psychiatric care and my life was desperate. She was able to first stabilize me, then give me the appropriate continuing care to help me live a better quality of life then I’ve had in decades. Her approach to psychiatric care is progressive and effective. I would highly recommend her to anyone struggling with mental health illness. I am forever grateful."
"I am a 54 year old woman with BiPolar 1.
A couple of years back I started to have issues with the medication cocktail that I had been taking for 14 years. I worked with Susan to find a better solution to my situation. It wasn't an easy fix. I did put my faith in Susan's experience. During my course of treatment with Susan I have always felt heard and have always been able to be included in the decisions we were making.
Many times at the end of the day when I didn't expect a call until morning, she would call to discuss either a lab report or address an email I've sent. I have come to value those calls because I genuinely feel cared about.
During many appointments together she has discussed the training she's attended and she has always brought back many exciting new methods and treatments she plans to use in her practice."
Monday-Thursday: 8:00 a.m. – 5:00 p.m.
Friday: 8:00 a.m. – 12:00 p.m.
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