Medicare is a federal medical insurance program. It attached to Social Security Disability Insurance claims. You must be an insured worker with an earnings record for this to cover you. For the disabled, after a claim is favorably decided, Medicare will begin the first day of the 25th month after the established onset date.
Medicare or MediCal is a state funded insurance program for the indigent. You must have less than $2000 in assets to be eligible for SSI and for Medicaid. A person found disabled under the SSI program is immediately eligible for this coverage.