The Veteran's claim for a total disability rating based on individual unemployability due to service-connected disabilities is being remanded for additional development, including obtaining his VR&ES file and private medical records, adjudicating the effective date of the reduction in his combined disability rating, scheduling an appropriate VA examination, and considering referral for extraschedular TDIU under 38 C.F.R. § 4.16(b).

The Board has decided to remand the Veteran's claims for service connection for lower back, right hip, and right ankle disorders as secondary to his left knee disorder. The AOJ must obtain VA examinations and provide answers to questions regarding the etiology of these conditions.

The Board denied service connection for treatment purposes only under Chapter 17 for various conditions, including cervical spine condition, right upper extremity nerve condition, left upper extremity nerve condition, headache condition, right wrist condition, left wrist condition, right elbow condition, left elbow condition, right shoulder condition, obstructive sleep apnea (OSA), bilateral pes planus, right ankle disorder, left ankle disorder, and left knee disorder.

The Veteran withdrew his appeal before the Board could make a decision on his service connection claims.

The Board dismissed the Veteran's appeal for service connection of a right ankle disorder.,The Board denied the Veteran's request for an earlier effective date for his service connection for gastroenteritis, lumbosacral strain, left lower extremity radiculopathy, right lower extremity radiculopathy, left ankle lateral collateral ligament strain, right knee strain and hemorrhoids. The earliest effective date is December 5, 2018.,The Board denied the Veteran's request for an earlier effective date for his service connection of a lumbosacral strain. The earliest effective date is December 5, 2018.,The Board denied the Veteran's request for an earlier effective date for his service connection of left lower extremity radiculopathy, sciatic nerve. The earliest effective date is December 5, 2018.,The Board denied the Veteran's request for an earlier effective date for his service connection of right lower extremity radiculopathy, sciatic nerve. The earliest effective date is December 5, 2018.,The Board denied the Veteran's request for an earlier effective date for his service connection of a left ankle lateral collateral ligament strain. The earliest effective date is December 5, 2018.,The Board denied the Veteran's request for an earlier effective date for his service connection of right knee strain. The earliest effective date is December 5, 2018.,The Board denied the Veteran's request for an earlier effective date for his service connection of hemorrhoids. The earliest effective date is December 5, 2018.