I just completed mine - it was more like 5 months by the time I completed all of the requirements.
Pysch eval - Met with a doctor and he asked me several questions about my thoughts, feelings, knowledge of WLS, my eating habits etc. I also had to take a 400 question personality test.
sleep study - Went in around 10pm, felt like I was covered in wires, very difficult to sleep - infact I never went into REM sleep. Out the door at 5am. They called me about a week later stating I had sleep apnea and had to go back to be fitted for CPAP machine. 2nd visit same as the first - went in around 10pm, hooked me up with all the electrodes, tried several types of masks, then went to sleep - this time I actually felt like I slept. Out the door by 5am. Got a call a few days later to come and learn/pick up the CPAP machine.
3 month nutritionist visits - met with a nutritionist every month for 3 months. Quick appointments - went over nutrition requirements, staying hydrated, pre & post op diet, just basic eating healthy info. Given info on WLS support groups in the area.
4 months of doctor supervised "diet" - Basically same info given to me at nutritionist appointment. I was weighed at this appointment and because my BMI is right at 40 I was basically told not to lose or gain any weight during this 4 month period. The doctor gave me more info regarding WLS, I would get samples of different Protein shakes etc & she would answer any questions I might have. Very quick appointments usually in/out within 15 minutes.
I had my last of my 4 month doctor visits on 4/28. The office submitted my info on 4/30. Aetna received my info 5/11. I was approved by Aetna 5/18. Recieved written approval from Aetna on 5/24. Heard from doctors office on 5/25 - preop scheduled 6/1, start my liquid preop diet 6/7, have final appointment with surgeon 6/8 and surgery is scheduled 6/10.