I served in the Marine Corps from 1980-2000. During Boot Camp and throughout my 20 career and even now, I suffer from incapacitating lower back pain, which is far worse today than it was during my years of active duty. The back issue was noted during my VA exam upon retirement, and didn't receive at rating in 2000 after I retired. In 2014, I decide to file a claim due issues with my, which had worsened. In May 2015, I was awarded a 10% disability rating under VA Code 5235. I know for a fact the lower back pain I experience today is a direct result of the trauma, wear and tear and misuse of my back during my military career. A recent MRI shows (Mild facet hypertrophic changes with congenital shortening of the lumbar vertebral pedicles resulting in mild narrowing of the neural foramen at the L3-4 through L5-S1 levels bilaterally. The central canal is patent throughout the lumbar region). My Doctor stated these are just terms that mean I have Degenerative Arthritis. I'm trying to determine if I should file a secondary claim for this issue under my current disability rating for my back pain or approach the Degenerative Arthritis as a separate claim seeing the range of motion has already established under my current disability rating?