If you are certified as a nursing assistant in a state and wish to transfer or obtain certification as a nursing assistant in another state, you must contact that state’s board of nursing. For example, you are certified as a nursing assistant in Pennsylvania and wish to become certified as a nursing assistant in Maryland. You must contact the Maryland Board of Nursing. Some states may accept your certification from your home state, while others may not. In that case you would have to complete an approved nursing assistant training program again.