Blackcaps stand-in skipper Tom Latham faces a four-week layoff, after fracturing a finger against Australia.
The injury occurred on the fourth day of the second test in Sydney, when Latham claimed the catch to dismiss Aussie batsman Marcus Labuschagne.
X-rays confirm a fracture of the left pinky that will leave the 27-year-old on the shelf until the one-day series against India next month.
Meanwhile, Lockie Ferguson is progressing well from a right calf strain during the first test in Perth. Blackcaps coach Gary Stead claims the quick bowler will return to domestic cricket in early February.
Stead has also updated the injury and illness prognosis of several other players.
"Trent Boult has been resting his broken right hand and will return to bowling later this week," Stead said.
"He’ll be touch-and-go to be available for the Indian T20 series later this month and we’ll continue to monitor him closely over the next few weeks.
"Matt Henry has had his broken left thumb splinted and will require around a month for it to fully heal.
"In this time, he will still be able to practice bowling and will look at a return to play early next month.
"Kane Williamson, Henry Nicholls and Mitch Santner are regaining their health, after being struck down with Influenza A, and will continue to be monitored, as they slowly rebuild their strength and fitness.”
The New Zealand T20 squad to face India will be named next week.