About Us

Our Anxiety Specialists

Kim Mathewson, Psy.D.           Michael Stein, Psy.D.          Claire Dean Sinclair, Psy.D.
Licensed Clinical Psychologists

We are a team of psychologists that have devoted our careers to helping people end the suffering caused by anxiety and OCD.  We are passionate about our work and strive to be excellent at what we do, so you can feel confident that you are getting the best quality of care available.

What makes us unique?

1. We are highly specialized.

Our practice is unusual in that we are focused exclusively on helping people with anxiety and OCD.  Most therapists are generalists, meaning they treat people with lots of different types of problems.   But anxiety and OCD are not like other problems.  They offer unique challenges that often require the help of a specialist. Because we have spent our careers focusing on anxiety and OCD, we have more experience and have successfully treated more people with these problems than most generalists.  We understand anxiety better and we know how to treat it better.  This is why we are likely to be effective for you even if you’ve previously found other attempts at therapy unsuccessful.

2.  We get real results by using Exposure Therapy.

Decades of research have shown that Exposure Therapy is the most effective treatment for all types of anxiety and OCD.  Unfortunately, training in this method is hard to obtain, so very few therapists actually use it.  But we have spent our entire careers specializing in Exposure Therapy specifically for anxiety and OCD.  We know how to tailor this powerful, effective treatment so it will work for you.

3.  We have probably seen your type of anxiety or OCD before.

Most people who come to see us feel crazy for having their anxiety.  Many of our clients come in thinking that they must be the only person in the world to have the thoughts that they have.  But because we have treated so many people with anxiety and OCD, it is unlikely that your fears will be something we haven’t seen and treated successfully many times before. Bottom line: Your thoughts may seem crazy to you, but not to us.  And we know what to do about them.

4. We do not just sit there and listen to you: We will show you how to take action on your anxiety.

We understand that you are coming into therapy because you want to make your anxiety go away.   So we will not merely sit and talk to you about the anxiety, we will show you what to DO about it. We will demonstrate and practice with you exactly what steps to take when you get anxious so that your anxiety gets better.   We will clearly explain what to do and why it will work. 

5. We give extra support between sessions.

Because we are committed to making sure your therapy works, we are happy to answer questions and offer guidance between sessions via phone or email.   We will do whatever it takes to help you get better.

6. We have appointments available in the evenings and all day on Saturdays.

We know that many of our clients have busy schedules that make it difficult or impossible to come in during work or school hours.  So we are happy to schedule sessions on Saturdays and weekday evenings to make things easier on you.

Dr. Michael Stein, Psy.D.

Michael SteinI am a licensed clinical psychologist specializing in adults and teens with anxiety and OCD. I love my work.  I enjoy treating anxiety and OCD and chose to specialize in this area because therapy for anxiety disorders is very effective, and because I discovered I had a talent for it early on in my doctoral training.  I find it to be a very personally rewarding specialty because the vast majority of people that I see for anxiety or OCD get dramatically better. My core values as a therapist are effectiveness, integrity, and service.  I got into clinical psychology because of this core value of service: It is important to me to have a career where I help people reduce their suffering and live fuller, more vital, more meaningful lives.  As a therapist, I get to work towards this goal in unique, exciting, and personal ways. I received my Bachelor’s Degree from Cornell University and my Master’s and Doctorate in Clinical Psychology from the University of Denver.  I founded and have served as President of the International OCD Foundation’s Denver affiliate, OCD Greater Denver, and still serve on its Board of Directors. I was trained as a behavioral therapist and am well-versed in Exposure Therapy and other forms of cognitive-behavioral therapy (CBT).  I have experience treating anxiety disorders and OCD in community mental health centers, college counseling programs, outpatient clinics, an employee assistance program, and the University of Colorado Hospital’s Center for Integrative Medicine.  I also enjoy teaching and training students and other mental health practitioners in the treatment of anxiety and OCD. In my spare time, I am an avid skier, rock climber, and chess player.  I have been skiing for 25 years and climbing for 20 years.  Needless to say, I am in love with Colorado and plan to spend the rest of my life here.  I am also (unfortunately for me) a die-hard New York Jets fan.  I live with my wife, our son, and our adorable golden retriever named Carabiner.

Dr. Claire Dean Sinclair, Psy.D.

ClaireI am a licensed clinical psychologist specializing in treating anxiety disorders and obsessive-compulsive disorder (OCD).  I work with children (and their families), teens, and adults. I received my bachelor’s degree from Lehigh University in Bethlehem, PA and my doctorate degree in Clinical Psychology from the University of Denver.  I completed my pre-doctoral internship at Children’s Hospital Colorado where I trained in the OCD and Anxiety Disorders Clinic as well as the hospital’s Rehabilitation department. Following graduation, I completed a post-doctoral clinical fellowship at the Behavior Therapy Center of Greater Washington in Silver Spring, MD, a leading clinic in the mid-Atlantic region for the treatment of anxiety disorders and related behavioral problems.  I then returned to Denver and joined Anxiety Solutions of Denver.  I also work part-time at Children’s Hospital Colorado and I serve on the Board of Directors of OCD Greater Denver, which is the local affiliate of the International OCD Foundation. One of the reasons I chose to specialize in treating anxiety disorders is that behavioral treatment for these problems has been shown to be very effective for many people.  I love working with my clients and seeing them get better.  Successful therapy for anxiety disorders requires that clients gradually face their fears, and I constantly feel honored to help people tap into bravery that they might not have known they possessed in order to face and ultimately conquer their fears. I am originally from the Washington, DC area and moved to Denver in 2006.  I love to cook and am always looking for my next favorite recipe.  I am a big sports fan and enjoy cheering for my hometown teams (Washington Nationals and Redskins) as well as those from my adopted hometown (Rockies and Broncos).  In addition to watching sports, I also love to participate in the wonderful athletic activities that our beautiful state provides.  I love to ski, hike, run, road bike, mountain bike, and generally spend as much time as I can in the incredible Colorado outdoors.

Dr. Kim Mathewson, Psy.D.

Dr. Kim Mathewson, Psy.D.

I am a licensed clinical psychologist who specializes in the treatment of a variety of anxiety disorders and OCD. I particularly enjoy working with children, adolescents and their families. I received my Bachelor’s Degree at the University of Colorado. I attended the University of Denver and received my Master’s and Doctorate in Clinical Psychology. I completed an APA-accredited internship at the University of Denver’s Health and Counseling Center. I graduated from the Trichotillomania Learning Center’s Professional Training Institute focusing on CBT-Based Treatment for Trichotillomania & Skin Picking Disorders. After graduate school, I have been dedicated to working in private practice with individuals with anxiety disorders. Two guiding principles of my life and work as a therapist are being honest and direct, and making meaningful improvements. Suffering is not necessary in life and I find gratification in helping individuals reduce their suffering and finding more meaningful ways to live. I believe in using only effective and evidence-based strategies for helping people overcome anxiety. I take a behavioral approach to therapy and have been trained in exposure-based treatments for anxiety, OCD, and PTSD. I am a Colorado native and enjoy all that Colorado has to offer. I began skiing from a young age and I love the winter. When not skiing, I enjoy rafting and camping in the summer. I have a yellow lab who I love and bring with me everywhere. As a former basketball player, I enjoy watching the Denver Nuggets.

Sheila Lepkin, MA, NCSP

Sheila Lepkin, MA, NCSPSheila is partnering with us to conduct the Courageous Kids Camp for kids with selective mutism. Sheila Lepkin has been a Nationally Certified School Psychologist for over 30 years.  She also has a certificate in Marriage and Family Therapy from the Denver Family Institute.  During her long career in the public schools, Sheila was Co-chair of the ADHD Task Force for the school district, developed an academic organization counseling program called Binder Doctor, and created and taught a summer class for ADHD students.Sheila worked as a counselor for Dr. Carmen Lynas’ Adventure Camp. She entered into private practice to help children with anxiety disorders with a family-school systems approach.  Currently she is the Colorado Coordinator for the Selective Mutism Group of the Child Anxiety Network.