Q. I stopped work in March 2009. I applied for OWCP. The Office of Workers’ Compensation Programs had paid for two back surgeries in 1989 and 1991 and continues to pay for ongoing treatment. I was denied OWCP, so I applied for disability retirement, which was approved. I am still on interim retirement pay. I withdraw some funds from my Thrift Savings Plan to cover me for the time period between OWCP and retirement. I now need to withdraw more for medical reasons. Since I am medically disabled from my federal position, as well as medically retired, what is the…