They mailed me the pamphlet after I applied. I'm sure you can find that info on SSA.gov also. My letter of denial of SSI benefits states that he must have a medical condition that causes severe and marked functional limitations and that condition must last or be expected to last 12 months in a row or result in death. They also told me that although my son's CF causes him some problems, it's not considered marked and severe functional limitations. We're still fighting.
When I appealed the man I spoke to told me straight out that its because none of his doctors sent in reports or medical records, from CF clinic or hospitalizations, only his pediatrician who knows very little about his condition and really only sees him for routine visits/immunizations. So I gathered all his med records myself and sent them in. I'm also calling and badgering the clinic docs to send in their reports. If we get denied this time, I'm sending his records to Beth Sufian and she will review them and see if she thinks we have a case. If she does, she'll be our lawyer and fight with us.
Amber, mom to Vinny (original poster)