Cochlear implants are very expensive and cost way more than hearing aids.
Health insurance sometimes will cover the cochlear implant if it's absolutely needed and it's good that health insurance will usually cover the cost of the Cochlear Implant since it costs around $100,000.00 to get a Cochlear Implant.
Medicare also covers the cost of the Cochlear Implants but not everyone is able to get a cochlear implant since it depends on the person and the severity of the hearing loss.