The Veteran's petition to reopen a previously denied claim for service connection for a left knee disability is granted. The Board also remanded the issue of whether the left knee disability is secondary to his service-connected right knee disability.

The Board denied service connection for multiple conditions, including bilateral hearing loss and various musculoskeletal issues, as well as an initial rating in excess of 0 percent for rhinitis. However, the Board granted a 70 percent rating for posttraumatic stress disorder (PTSD).

The Board remands the claims for service connection for various disabilities to the AOJ for further development and consideration of evidence not previously considered.

The Board granted service connection for right knee, right hip, and lumbar spine disabilities as secondary to the Veteran's service-connected left knee disability but denied a rating in excess of 30 percent for his left knee disability prior to April 25, 2019.

The Board granted service connection for multiple disabilities, including cervical spine and thoracolumbar spine disabilities, radiculopathies, a bladder disability, headaches, a left knee disability, an acquired psychiatric disorder, and bilateral conjunctivitis. The Board also granted entitlement to a total disability rating based on individual unemployability due to service-connected disability.