Primary Residence and Medical exam Form I-693

[nkumar1306]

I am sponsoring my parents green card and currently my parents are staying at my sister's place who lives in a different state (west coast) for five months. I live in east coast and wanted to know about the following.

1. Since, I am sponsoring green card for them, is it okay to put my address as my parent's current physical address in all forms (130, 485, 325A, 864, 693) or should I put my sister's address? Which would be recommended?

2. For medical exam (I-693), is it okay for my parents to take physical medical exam at my sister's place when I put my address as my parent's current physical address as I have to put the address in Form I-693 as well? If I put my address in form I-693, but place of medical exam is a different city, would that be a problem?

Please let me know as I need to sponsor their green card within next two months before their I-94 expires.