I received 20% DOD and 80% VA ratings today. I will be appealing and was wondering if anyone has any advice for me. It would be much appreciated. My referring condition was a back injury. I was rated 20% for lumbar spine DDD/pain. The VA gave also gave me 10% for left sciatica and 10% for right sciatica. My hope is that I can argue that the sciatica and DDD should be combined.