The Board denied the Veteran's claim for service connection for a lung disability, finding no evidence of a link between his in-service complaints and current lung conditions.

The Board denied ratings in excess of 30 percent for bilateral foot disability, a rating in excess of 30 percent for left knee disability, and a rating in excess of 10 percent for lung disability. However, it granted an effective date of December 17, 2012, but no earlier, for the award service connection for limitation of extension of the left knee and left knee scar, and granted TDIU from January 17, 2013 to November 5, 2018.

The Board granted a 10 percent disability rating for the service-connected scar, status-post appendectomy, but denied all other claims for increased ratings and service connection.

The Board remands the claim for service connection for lung disability to obtain an addendum opinion addressing the etiology of the Veteran's lung conditions, including COPD and biapical lung scarring.

The Board denied service connection for a psychiatric disability, lung disability, and heart disability. The claims for migraines/sinus headaches, allergic rhinitis, sinusitis, and sleep apnea were remanded for further development.