The requirement I normally hear for SRS is...
"If the first letter is from a person with a master's degree, the second letter should be from a psychiatrist or a Ph.D. clinical psychologist..."
So your main therapist doesn't have to be a psychiatrist or psychologist, you just need one of them to provide a *second* evaluation later if you pursue SRS. Well... most surgeons do anyway if they follow the Standards Of Care.
~Kate~