The Veteran's service-connected degenerative arthritis of the lumbosacral spine and bilateral lower extremity radiculopathy have rendered him unable to secure or follow a substantially gainful occupation, meeting the criteria for TDIU.

The Board has remanded two issues: entitlement to a disability rating in excess of 20 percent prior to March 23, 2009 for degenerative arthritis of the lumbosacral spine and entitlement to an extraschedular disability rating for the same condition. The Veteran is asked to provide lay statements from individuals who have observed his symptoms during flare-ups and without medication. A retrospective medical opinion is needed to assess the severity of his condition prior to March 23, 2009.

The Veteran's claims for service connection for bilateral lower extremity radiculopathy on the basis of CUE in the February 1996 rating decision have been denied. The May 2022 rating decision is also dismissed as it failed to grant service connection.

The Veteran's PTSD is granted as service connection was established based on a diagnosed condition and credible supporting evidence of an in-service stressor.,Service connection for low back disability is granted, with the diagnosis being intervertebral disc degeneration and spinal stenosis of the lumbar region (low back disability).,The Veteran's bilateral lower extremity radiculopathy secondary to his now service-connected low back disability is granted. The link between the two conditions was established by medical evidence.,Service connection for residuals of a head injury, manifested as head pain, memory impairment, loss of balance, and dizziness, is granted based on credible supporting evidence that the claimed in-service stressor occurred.,The Veteran's right foot disability does not meet service connection criteria.

The Veteran's claim for separate ratings for bilateral lower extremity radiculopathy has been dismissed as the appeal is moot due to the grant of service connection and the subsequent denial of an increased rating.