AUSTIN, TX (CNN) — An 84-year-old Texas man is now the oldest living kidney donor in the United States.

Frank Dewhurst was out for a walk in his Austin neighborhood when he saw a sign that said, “I am type O and I need a kidney transplant. Please help me.”

He was a match, so he decided to donate.

A doctor said Dewhurst was an ideal candidate since he was active and not on any medications. 

The procedure went well and now 72-year-old Linda Nall has a new kidney.

Both Nall and Dewhurst are doing great.

Dewhurst said he hopes others who are healthy will also donate, no matter how old they are.

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