Subject to state law/regulation, RNs, LPNs, LVNs, paramedics, EMTs, and other clinicians may also be qualified for this positionIf applicable, based on the requirements of state, in addition to a valid state license, current National Board of Respiratory Care Credentials may also be required for. clinician authorized within scope of practice (as established by applicable state law or if none, by the applicable national board) to provide all patient care services offered by Lincare from time to time.