It is highly recommended especially at high-altitude locations like Annapurna Thorong La Pass, Thre high pass in Everest region.
Many people suffer from Acute Mountain Sickness (AMS), and some need to be evacuated
quickly to Kathmandu, which is done by helicopter rescue. The charge by helicopter service is a minimum of $6500 USD. So,
it is worth getting both medical and high-altitude rescue insurance just in case you are hurt or
sick during the trekking period.