Deputy Commissioner John Tims confirmed the death on Monday morning.
He said the person died while in Middlemore Hospital on Sunday night,with police being advised shortly before 11pm.
The person's death brings the official number of. Of the deaths,16 died in New Zealand and one in Australia.
The official of 17 toll does not include two people still missing,presumed dead,in the waters around the island.
They are Kiwi tour guide,40,and Australian teenager Winona Langford,17.
Marshall-Inman was farewelled in a memorial in Whakatāne on Friday where he was remembered as a"superman",a"hero"and,now,a"guardian of Whakaari".
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