The only way a life insurance carrier can cancel your life insurance policy is if you don't pay your premiums which means your coverage would lapse, it would no longer be In Effect.
If your health condition developed after the life insurance policy was placed In Force, the insurance carrier cannot cancel your policy.
NOTE: if you intentionally lied on the application for the life insurance coverage and the kidney failure was a pre-existing health condition prior to placing your life insurance policy In Force and you're still within the first 2 years of being insured by the life insurance policy (the Contestability Period), the insurance carrier could rescind the life insurance coverage if it's discovered.
Once the contestability period has expired (more than 2 years after the start of your coverage), the insurance carrier cannot rescind a policy due to misinformation on an application for life insurance coverage.
If you have a health problem and need life insurance you may want to consider guaranteed acceptance life insurance from Vantis Life.