First of all CNAs are not licensed by the state. They are state certified and must be in the states certification registry data base. CNAs may work on a Nursing Home Floor, in a Hospital, Med surg, Obstetric and Pediatric Dept, ICU, ER, etc. If you notice in a Hospital every patient has there own CNA, LPN, and RN assigned to them. CNAs may alos work in home health agencies, going from house to house seeing up to 10 patients a day bathing them, assisting with their wound dressings, and obtain their blood glucose reading and vital signs. CNAs are certified medical professionals, who perform entry level medical tasks, PCAs or Caregivers are employed by non medical personal care service agencies, wich provide non medical care tasks such as feeding, brushing, doing laundry, wheeling, for elderly or disabled!!!