5 /5 Karon Campbell: Dr. Sahad is very knowledgeable, experienced, thorough, and kind. Iām so very thankful that his office is in San Marcos rather than having to travel to Austin, which I did for many years. As I am not great at doing everything I should such as breathing exercises, walking, etc., I really appreciate the gentle reminders and encouragement, as well as reinforcement. He has really helped with the treatment of my lungs!