National Organ Donor Registry Organ Donation- Can I Decide?

Organ Donation- Can I decide? - national organ donor registry

I researched online and discovered that the donor organ will go to the person within the national waiting list with the greatest severity of illness, the duration of the longest wait, etc.
When a family member needs a transplant can directly select which I go to the mine, or is the organ procurement and transplantation network was intended to decide?
Thank you.