Below is a chart labeled "Allowance rates for first DI applications filed by veterans after receiving VA disability ratings of 100% or IU during fiscal years 2000–2006, by VA rating and SSA primary diagnosis body system and selected diagnostic categories." This appears in Veterans Who Apply for Social Security Disabled-Worker Benefits After Receiving a Department of Veterans Affairs Rating of “Total Disability” for Service-Connected Impairments: Characteristics and Outcomes by L. Scott Muller, Nancy Early, and Justin Ronca published in the Social Security Bulletin, the agency's research journal. DI refers to Social Security Disability Insurance Benefits. IU refers to Individual Unemployability. Veterans may be approved for 100% VA disability benefits either with or without consideration of IU.
Overall, Social Security is denying about 31% of disability claims filed by veterans with a 100% VA rating. Social Security approves only 43.5% of these 100% disabled veterans claims at the initial level and 13.8% at reconsideration but 70.8% at the Administrative Law Judge level. Social Security is turning down 25.3% of the claims filed by veterans determined 100% disabled by VA due to traumatic brain injury and 34.8% of those found 100% disabled by VA due to dementia associated with brain trauma.
Overall, Social Security is denying about 31% of disability claims filed by veterans with a 100% VA rating. Social Security approves only 43.5% of these 100% disabled veterans claims at the initial level and 13.8% at reconsideration but 70.8% at the Administrative Law Judge level. Social Security is turning down 25.3% of the claims filed by veterans determined 100% disabled by VA due to traumatic brain injury and 34.8% of those found 100% disabled by VA due to dementia associated with brain trauma.

