Greetings, and thank you for your questions. These are ICD-9 codes. Do you know what an ICD-9 code is?
Each different disorder is given a code. ICD stands for "International Classification of Disorders." It is a way to standardize disorders around the world, so a doctor in the U.S. knows what a doctor is Germany is talking about.
These numbers you have listed have a specific disorder. For example, 311 means "Depression, Not otherwise specified."
Here is how the rest are translated:
296.80 - Bipolar Disorder, not otherwise specified (NOS)
By the way, NOS merely means it suggests the disorder, but not enough evidence exists to say for sure.
296.5 - Bipolar Disorder, Type I, most recent episode depressed
GAF is the "Global Assessment of Functioning."
It is a way to tell, in a snapshot, how you think a person is doing. It is ranked on a 0-100 scale, with 100 meaning essentially doing wonderfully.
A score of 59 basically means functional, but at a minimum level, with impairment noted readily.
Hope this helps! Please let me know if I may be of further service, and please provide feedback if this was helpful!