Description. Could you be our next Licensed Practical Nurse LPN for Endocrinology in King of Prussia, PA. Why work as an LPN with Main Line Health. All Newly Hired Licensed Practical Nurses will receive a. $2000. Sign on Bonus. . Main Line Healthcare is at the forefront of medical excellence, combining clinical expertise with compassion. As part of the Main Line Healthcare family, our physicians collaborate with the hospitals and specialists of M...