Given the inherent dangers associated with such high altitude, it's imperative that you take out comprehensive travel insurance that covers you for hiking up to this altitude.
Everest Base Camp is well above 5,000 m in elevation. Given the inherent dangers associated with such high altitude, it's imperative that you take out comprehensive travel insurance that covers you for hiking up to this altitude. Usually policies have an option for "hiking up to 6,000 m", and that's what you want to pick.