As a New York resident Dr. Leong attended Columbia University for his undergraduate degree, majoring in chemistry. His doctorate in dentistry was earned from the State University of New York at Buffalo. Moving out west, he was a resident at the University of California at San Francisco, completing its orthodontic program in 1985.

Dr. Leong is an active member of the American Association of Orthodontics, Pacific Coast society of Orthodontics, American Dental Association, California Dental Association, Santa Clara County Dental Society, and the Mid-Peninsula Dental Society.

The treatment of young children, seven to ten years old, is the arena where Dr. Leong excels. His philosophy of growth modification allows for corrections of overbites, crossbites, underbites and crowding at an early age. This prevents extractions and jaw surgeries, which would be done in the teenage and adult years in many cases.

Invisalign is the latest and most advanced modality of treatment, which allows for correction of crowded teeth without the use of braces. Dr. Leong is an approved Invisalign orthodontist and is very enthusiastic that he is able to offer this exciting new technique to his juvenile and adult patients.

Dr. Leong and his family are active in their church. Also, over the past couple of years he has developed a love-hate relationship with golf.