You may wonder if you can get Social Security benefits if you are already receiving disability payments under a private insurance policy. The answer is YES BUT.
Most private disability policies require you to apply for Social Security disability. If you are approved by Social Security then the insurance company receives a credit for the amount you get under Social Security.
Special rules apply that limit the total amount of disability benefits you can receive from all sources. Why? Because if people could receive more money from disability payments than they made working there would be a great incentive to try to get disability fraudulently.
If you were injured on the job and receive Workers Compensation payments there may be some set off of your Social Security payments for the same reason. If you receive payments from other sources, like private pensions, your Social Security disability payment will not be affected.