Boston Medflight is starting the new year by adding more aircraft to the skies.

The nonprofit, which provides critical care medical transport by air and ground, has received two “tax-exempt leases” of nearly $17 million that it will use to buy and medically retrofit a Cessna Citation CJ4 jet and an Airbus H145 helicopter.

MassDevelopment, the state’s development finance agency and land bank, issued the leases totaling roughly $16.78 million, and Bank of America purchased them, helping “Boston MedFlight achieve a lower cost of capital,” officials said in a release.

“These aircraft will enhance our intensive care fleet, allowing us to safely and quickly transport patients to the region’s world-class hospitals,” Boston Medflight CEO Maura Hughes said in a release. “We appreciate MassDevelopment’s support in helping us expand our capabilities across New England.”

Boston MedFlight, founded in 1985 by a consortium of city hospitals, added to its fleet last June with a Cessna Citation CJ4 jet, an aircraft that has a range of 1,500-plus miles, a cruising speed of 460 mph and additional room to carry a family member or escort.

That jet also came via a tax-exempt lease from MassDevelopment which in total has allocated roughly $63.9 million towards Boston MedFlight. The funds have helped the nonprofit purchase six medically configured helicopters.

“Boston MedFlight is an asset to the Commonwealth’s health care ecosystem with its dedicated transport, care, and communications teams getting patients where they need to be in the event of a life-threatening emergency,” said MassDevelopment President and CEO Dan Rivera. “

With its fleet of jets, helicopters and critical care ground ambulances, the nonprofit annually cares for more than 6,500 patients including the most critically ill and injured infants, children and adults.

All of Boston MedFlight’s vehicles are outfitted with state-of-the-art medical equipment and serve as mobile intensive care units, with highly trained critical care nurses and paramedics. The nonprofit provides more than $7 million in free and unreimbursed care to patients in need with little or no medical insurance.