These are the values that you need to have checked, especially if you're concerned with testosterone deficience (or considering HRT). It's pretty comprehensive:
• Total Testosterone
• Bioavailable Testosterone
• Free Testosterone
• sex hormone binding globulin
• dihydrotestosterone
• Estradiol (specify “ultrasensitive” assay for males)
• lh - leutenizing hormone -
• FSH - follicle stimulating hormone -
• Prolactin
• Cortisol
• Thyroid Panel
• CBC
• Comprehensive Metabolic Panel
• Lipid Profile
• PSA (if over 40)
If you have insurance and want to keep your doctor in the loop, just be honest with him, tell him that you're feeling lethargic all the time, your libido is shot, poor erections, you can't focus during the day at work/school. This should signal a good doctor to check your testosterone levels, otherwise just tell him that someone had the same problem and recommended you ask your doctor about it. Be warned though, some doctors don't even know what SHBG or Prolactin are (one of my doctors didn't)...so you may have to "steer" him if he's willing.