Progress begins from within.

Start where you are.

A clear night sky filled with countless stars and a faint view of the Milky Way galaxy.

Inspired by

“ad astra per aspera”

At Ad Astra Psychiatric Services, we recognize that the path forward is not always easy. Inspired by ad astra per aspera, we walk alongside individuals through uncertainty and challenges - offering compassionate, people-centered, and evidence-based care. Our dedicated mental health providers support each individual in building resilience, overcoming obstacles, and moving toward greater wellness.

Our Services

Outline drawing of a shooting star with a trail.

Our Services

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Flexible, expert advice when you need it. Book hourly support across a range of topics—from planning to problem-solving. This focused consultation will help clarify your goals, map out next steps, and identify opportunities for growth.
Flexible, expert advice when you need it. Book hourly support across a range of topics—from planning to problem-solving. This focused consultation will help clarify your goals, map out next steps, and identify opportunities for growth.
Flexible, expert advice when you need it. Book hourly support across a range of topics—from planning to problem-solving. This focused consultation will help clarify your goals, map out next steps, and identify opportunities for growth.
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All care is personalized, collaborative, and paced according to your individual needs.

Book Your Appointment

Meet the Team

Allister E. Wilton

MD
MANAGING PARTNER

Dr Allister Wilton is an ABPN-certified psychiatrist with additional training in Addiction Medicine and Internal Medicine. He provides thoughtful, patient-centred care grounded in both psychiatric and medical expertise.
His training includes combined residency in Internal Medicine and Psychiatry, as well as a fellowship in Addiction Medicine at the University of Iowa Hospitals and Clinics. Growing up in a rural medical practice shaped his belief in the importance of compassionate, accessible care.
Thomas Larson

MSN ARNP PMHNP-BC
PSYCHIATRIC NURSE PRACTITIONER | MANAGING PARTNER

Thomas is a Psychiatric Nurse Practitioner with over 18 years of healthcare experience, providing comprehensive, patient-centred mental health care.
He has worked across inpatient and outpatient settings, including within the VA healthcare system, supporting individuals with a wide range of conditions such as mood disorders, anxiety, PTSD, and complex psychiatric presentations.
Devin Keenan

PA
PSYCHIATRIC PHYSICIAN ASSOCIATE | MANAGING PARTNER

Devin is a Physician Assistant trained at the University of Iowa Carver College of Medicine, with over seven years of experience providing personalised psychiatric care to adults.
He has worked across a range of settings, including outpatient, emergency, consult liaison, and interventional psychiatry, allowing him to support patients with diverse needs.
Brooke Byun

MD
PSYCHIATRY & NEUROLOGY - PSYCHIATRY
Juliana Gronseth

LISW - Therapist
Sarah Salamati

LISW - Therapist