If he is a minor or you are his guardian then you can. If not you cannot know even though he is your brother.

This is true (unless you have a legal conservatorship over your brother or he is a minor and you are his legal guardian).

Without a signed waiver from your brother or a court order, that is true.  Unless you are his custodian, that will not happen.

If you work in the office, you can have access to his file for anything related to your actual work, legally. Ethically, the owner is wise to not give you access to family member's files for any reason, and they are free to set that policy.

If you do not work in the office, of course you have no right o know any of that info.

True, except it’s HIPAA.

i think its true, ask your brother if you want to know

you bet your sweet bippy it is, nosy.

Absolutely. You have no biz knowing it without your bros say so.

Yes, that's true except for that it's called hipAA, not hiPPa. Your brother can tell you, of course ...but you can't look it up on your own.

If you have court-ordered legal guardianship, no problemo dude.