The Board granted a 30 percent rating for Barret's esophagus and hiatal hernia with GERD based on the Veteran's persistent symptoms of epigastric distress, dysphagia, pyrosis, regurgitation, substernal pain, sleep disturbance, nausea, and vomiting.

The Board denied service connection for asthma, GERD, hiatal hernia, Barret's esophagus, and sleep apnea as there is no evidence of a causal relationship between the current disabilities and in-service exposure to toxins.

The Board has remanded the Veteran's claims for service connection due to insufficient evidence regarding his claimed conditions and their relationship to military service, particularly exposure to herbicide agents. The Veteran is presumed to have been exposed to herbicide agents during his service in Thailand.

The Veteran's dental condition, claimed as extracted teeth, is denied due to lack of evidence showing a current disability for VA compensation purposes.,Service connection for the right shoulder disability is denied because there is no direct service connection and the Veteran's current disability is less likely related to his in-service injury. The examiner noted that the current shoulder disability is more likely related to time and age rather than the in-service injury.,The Veteran's right arm disability is not supported by evidence of a current disability for VA compensation purposes.,Service connection for obstructive sleep apnea is remanded as there is no direct service connection established.,Service connection for a kidney disability, claimed as a 'hump' on the kidney, is remanded due to lack of evidence supporting its relationship with in-service events or diseases.,Service connection for polycythemia is remanded because it has not been shown to be related to an already service-connected condition (hemorrhoids and hiatal hernia) or a pre-existing condition aggravated by the service-connected conditions.,An initial rating in excess of 20 percent for right knee DJD with limitation of flexion from November 29, 2018 is remanded due to lack of evidence supporting an increased disability level.,An initial rating in excess of 10 percent for right knee DJD with limitation of flexion prior to November 29, 2018 is remanded due to lack of evidence supporting an increased disability level.,An initial rating in excess of 10 percent for right knee DJD with lateral instability prior to November 29, 2018 is remanded due to lack of evidence supporting an increased disability level.,An initial rating in excess of 10 percent for left knee DJD is remanded due to lack of evidence supporting an increased disability level.,An initial rating in excess of 30 percent for hiatal hernia with GERD prior to November 29, 2011 is remanded due to lack of evidence supporting an increased disability level.,An initial rating in excess of 10 percent for hiatal hernia with GERD from November 29, 2011 to February 4, 2020 is remanded due to lack of evidence supporting an increased disability level.,An initial rating in excess of 60 percent for hiatal hernia with GERD since February 4, 2020 is remanded due to lack of evidence supporting an increased disability level.,Total disability rating for compensation purposes based on individual unemployability due to service connected disability (TDIU) is remanded as there is no direct service connection established.

The Board has denied service connection for a hiatal hernia with GERD and atypical chest pain, finding that these conditions are not attributable to service.