In case you were wondering about chords with higher numbers, it continues on in the same way. It doesn't go any farther. When you get to 15, you have started over. It is always assumed that these extended notes are as they would be in a major scale whose root is the root of the chord. If they are to be altered, they must be addressed individually.
Many notes are optional.
Those that are not are the third, the seventh, and the highest extension. That's tertiary harmony in a nutshell. I'd really apreciate hearing about it.