No, ADTs do not count towards time in service for pay or towards your 20. It has always been rumored that you would get the 240 points (45 for the ADT and 15 for just having your name on the books each year.) you earn while in HPSP once you retire (essentially an extra 2% of base pay for retirement), but I have never found that chapter and verse. USUHS students do have their 4 years of school added for retirement percentage (an extra 10%)