Dr. Guo trained in the Penn Adult ADHD Treatment and Research Program, where he worked under the direct supervision of world experts in ADHD. He is passionate about treating the disorder and finds the work to be extremely rewarding.

Approximately 2/3 of children diagnosed with ADHD continue to have symptoms as adults. Although the overt behavioral symptoms seem to improve with age, the more subtle symptoms (such as difficulty sustaining attention, impulsivity, and low frustration-tolerance) tend to cause significant impairment in relationships and at work. This often manifests in behaviors such as:

  • Distractibility
  • Chronically being late
  • Being unable to stay on task
  • Not following through on your word 
  • Being disorganized
  • Procrastinating, avoiding starting tasks that are difficult
  • Often interrupting other people before they finish talking
  • Often forgetting things such as your keys or your wallet
  • Being easily irritated
  • Not thinking before acting

Although these symptoms individually can be due to many reasons, if you chronically have had these issues and it is impairing your daily life, it is certainly worth getting evaluated. People with ADHD are often accused of "being lazy," but over the past few decades, it has been increasingly recognized as a neurodevelopmental disorder that is responsive to treatment. That means that it is a lifelong disorder of the brain that affects your ability to organize and start tasks, stay focused and motivated, regulate your emotions, and think before you act. 

It is estimated that about 4-5% of adults in the United States meet criteria for ADHD, and less than a third of those adults are actually diagnosed. The longer ADHD goes untreated, the more it can affect one's self-esteem. However, once diagnosed and properly treated, people with ADHD can improve most, if not all, of their symptoms. One of most difficult barriers, often, is establishing a diagnosis.

Dr. Guo has experience in diagnosing and treating ADHD in adults throughout the lifespan using medications, therapy, or both.

If you think you may have ADHD, feel free to contact Dr. Guo to inquire about treatment options. He finds the work to be extremely rewarding and wants to help you gain the insight and the skills to overcome the disorder.


  1. Biederman, J., Petty, C. R., Evans, M., Small, J., & Faraone, S. V. (2010). How persistent is ADHD? A controlled 10-year follow-up study of boys with ADHD. Psychiatry Research, 177, 299-304. 
  2. Feifel, D., & MacDonald, K. (2008). Attention-deficit/hyperactivity disorder in adults: Recognition and diagnosis of this often overlooked condition. Postgraduate Medicine, 120, 39-47.