Gastroenterology Specialists of Naples. As the premier gastroenterology and hepatology practice in North Naples we would like to welcome you to Gastroenterology Specialists of Southwest Florida, PA., the offices of Steven Meckstroth, MD, William Gonzalez, PA-C, and Karina Hooper, PA-C. We specialize in the treatment of diseases of the digestive ...About Us‧Patient Info‧Services‧Our Providers‧Premier Endoscopy Center‧Healthy Advice Column.