If you are a veteran, you may qualify for both VA benefits and SSD benefits. To be eligible for VA benefits, you must have served in active duty and received a discharge other than dishonorable.
You also have to prove that your condition was caused by or worsened by your military service. Qualifying conditions include, among other things, cardiovascular problems, PTSD, and depression.
VA disability benefits can be approved in ten percent increments from 10% to 100% disabled. On the other hand, to qualify for SSD benefits, you must be 100% disabled.
If you apply for VA benefits, the VA determines whether to approve your claim and at what level. You can file an appeal if you were denied benefits, if you believe your condition justifies a higher level, or if you believe you qualify for an earlier effective date for the disability. If an existing medical condition worsens, you should file a new application rather than an appeal.