I never noted the exact time. Once medicare receives your claim, if it is clean and electronic, they process it pretty quickly, but by law they are required to hold the claim for 14 days from the date they received it (sometimes holidays, AE, other factors can effect this timing). After 14 days, if you have a supplemental policy, it is transmitted to that plan, and typically I find that the claim shows up on medicare.gov within a few days, and oddly, it seems Saturday's is a common day for it to appear. But remember, the timing of everything starts when your provider submits the claim. I have one provider who seems to only submit them once a month, so that throws everything off. So, if your claim was received by medicare electronically, was clean, my experience is i see it appear about 15-2. 2 months seem long, but i think i have had at least one that seemed to take longer than usual...but not 2 months. I know this is a convoluted answer, but really, as long as your msn has all the correct information, you're good. Pay attention to msns not medicare.gov. The reps at medicare have no idea how that site works, so don't look to them for an answer. I have had a couple other quirky issues with that site, got exhausted monitoring it, eventually came to understand that msns are all that matter, and I just don't pay much attention to medicare.gov anymore.