Canada Life has extended the Red Arc and Best Doctors support services to all existing group critical illness (CI) members.
The move follows last year's relaunch of the product which included the services for all new schemes.
Paul Avis, sales and marketing director at Canada Life, said: "We are now pleased to offer these additional services to our existing group critical illness customers.
"In the event of being diagnosed with a critical illness, both services deliver medical and emotional support at the time when they are needed the most."
The support services are available immediately.