According to DFAS officials, civil service retirees who combined their military time with their civil service time in order to qualify for a civil service retirement are not eligible for Concurrent Disability Pay. On the other hand, those who combined their military time with their civil service time in order to enhance their civil service retirements may be eligible for CDP. Officials point out that those who are eligible will have to coordinate with the Office of Personnel Management to reverse the waiver of retired pay. It’s important to note that by doing this, the retired member may incur a debt to the government resulting from an overpayment. The CDP law applies to retirees who have a VA-rated, service-connected disability of 50 percent or more. Individuals who retired for disability rather than under the regular retirement law must have at least 20 years of service. Visit http://www.dfas.mil/money/retired/cdpfaq.htm.