Versions of Oregon Statutes 677.520 - Performance of medical services by unlicensed physician assistant prohibited on LawServer 2023 Oregon Statutes 677.520 – Performance of medical services by unlicensed physician assistant prohibited 2021 Oregon Statutes 677.520 – Performance of medical services by unlicensed physician assistant prohibited 2019 Oregon Statutes 677.520 – Performance of medical services by unlicensed physician assistant prohibited 2017 Oregon Statutes 677.520 – Performance of medical services by unlicensed physician assistant prohibited 2015 Oregon Statutes 677.520 – Performance of medical services by unlicensed physician assistant prohibited 2013 Oregon Statutes 677.520 – Performance of medical services by unlicensed physician assistant prohibited 2009 Oregon Statutes 677.520 – Performance of medical services by unlicensed physician assistant prohibited