What do you suggest if my endocrinologist is testing my 17-hydrox. level. what disease is he testing for?

Must assume: Hi. There's no such test as "17-hydrox.". There is a 17-hydroxyprogersterone (17(OH)-P), which is elevated in the most common cause of non-classical congenital adrenal hyperplasia", 21-hydroxylase (an enzyme) mutation. If you have hirsutism and irregular/absent periods, and especially if you're not overweight, 21-hydroxylase mutation is worth checking for. If so, your androstenedione will be high.