I've been doing Social Security work since 1978 so it's not often I get a question that I haven't heard before but here's a new one on me. Let me explain some background first. There's a 24 month waiting period for Medicare after Social Security Disability Insurance Benefits begin and that waiting period only begins after the five month waiting period for cash benefits to start. Yes, it's brutal. As long as the waiting periods are, many cases are delayed long enough that the claimant is entitled to back Medicare benefits. To get Medicare Part B, the part that pays for outpatient medical treatment, you have to pay monthly premiums. What happens in cases with retroactive Medicare entitlement is that the Medicare Part B doesn't go back unless you pay the back premiums. The question is can you take the retroactive Part B for only part of the time period for which you're eligible for it? This claimant's case had gone on for a very long time. The period of retroactive Medicare entitlement is about 30 months. The claimant had health care insurance until about nine months ago. She feels she won't get much value out of retroactive Medicare Part B until her health care insurance ended so she only wants the retroactive Medicare Part B for the last nine months instead of the entire 30 month time period. The difference in retroactive Part B premiums is over $2,000 so this isn't an academic question. Does anyone have experience with this question?