Remember, the va doesn’t care how jacked up your back is! I have 7 herniated disks in my lumbar region with no disk left at L5-S1. Its all about ROM(range of motion)!!! I receive 10% for my lumbar region since 1998. I’ve tried for an increase over the years with no increase. You can claim ricopathy ( or how ever it’s spelled) in both extremity separately. I get 20% for each leg. I also think that you can claim sciatica separately. DDD and IVDS are very different claims. IVDS is very hard to get rated because of the bed rest thing. DDD is what ,in my opinion, you should claim! Remember though, ROM is the defining factor for any type of back injury! And as far as I can remember the max you can receive for IVDS is 60% if you’re entire back is fused. DDD is 40% without the back being immovable.