Clinical Psychology & Therapy Services in Overland Park, Lenexa & Leawood, KS
At Momentum Mental Health Services, we provide compassionate, evidence-based therapy for adults navigating some of life's most challenging mental and physical health struggles. Led by Dr. Tim Streitwieser — a PsyD-level Clinical Psychologist with over 17 years of experience — our practice specializes in insomnia management, chronic pain intervention, depression, anxiety, and adjustment to health changes. Using proven approaches like Cognitive Behavioral Therapy (CBT) and Acceptance and Commitment Therapy (ACT), we help clients build real, lasting progress — not just short-term relief. We offer both in-person sessions and telehealth therapy, and are licensed to see clients across more than 40 states. Whether you're exhausted from sleepless nights, overwhelmed by persistent pain, or simply ready to feel more like yourself again, we're here to help. Take the first step — schedule a free 15-minute consultation today.
Areas of Care
Insomnia
Depression
Pain Management
Anxiety/Stress
Health Changes
Life Adjustments
How We Can Help
Evidence-Based Therapy That Gets to the Root Life doesn't stop when you're struggling — and neither should your care.
At Momentum, we take a goal-focused, whole-person approach to therapy. That means we don't just talk about how you're feeling; we work with you to understand what's keeping you stuck and build practical skills to move forward. Our two primary treatment approaches — Cognitive Behavioral Therapy (CBT) and Acceptance and Commitment Therapy (ACT) — are among the most thoroughly researched methods in modern psychology. CBT helps you identify and shift the thought patterns and behaviors that fuel anxiety, poor sleep, or low mood. ACT helps you build psychological flexibility so that pain, stress, or difficult emotions no longer have to control your daily life. Together, these approaches are effective for a wide range of concerns, including chronic insomnia, chronic pain, depression, anxiety, and major health adjustments. Every treatment plan at Momentum is individualized. We don't believe in one-size-fits-all therapy. Whether you're dealing with a new diagnosis, a life transition, or something you've been carrying for years, Dr. Streitwieser works with you to set meaningful goals and measure real progress.
In-Person & Telehealth Therapy in Kansas and Beyond
Serving Overland Park, Lenexa & Clients Across the Country
Momentum Mental Health Services is based in Lenexa, KS, with in-person therapy available to clients in Overland Park, Leawood, and the greater Kansas City metro area. For those who prefer the flexibility of remote care, we offer secure telehealth therapy and are licensed or authorized to see clients in more than 40 states — including Kansas, Missouri, Texas, Colorado, Illinois, and many more. Telehealth sessions are conducted via a HIPAA-compliant video platform and are just as effective as in-person care for most concerns. Many clients appreciate the convenience of connecting from home, especially when managing chronic pain or insomnia that makes travel difficult. If you're unsure whether in-person or telehealth is right for you, we're happy to talk it through — start with a free 15-minute phone consultation and we'll figure it out together.
Dr. Tim Streitwieser — Clinical Psychologist
Dr. Streitwieser brings a rare combination of clinical depth and real-world experience to every session. He has served as Deputy Chief of Mental Health at a major medical center and as Director of an Integrated Pain Clinic — giving him expertise in the complex relationship between physical health and mental wellbeing that few therapists possess. Trained at Spalding University (PsyD) and through an APA-accredited VA internship, Dr. Streitwieser has spent over 17 years helping adults manage conditions that other providers often struggle to treat: chronic insomnia, persistent pain, adjustment to serious illness, and the anxiety and depression that so often accompany them. He has also served as an adjunct professor at the graduate and undergraduate level for more than 14 years. His approach is direct, evidence-based, and deeply human. You'll leave each session with something concrete — a technique, a shift in perspective, or a clear next step.
