Welcome to Our Practice. At Pulmonary Associates of Lancaster we are dedicated to improving the lives of those affected by pulmonary disease, critical care needs, or sleep disorders. Our Experts Design a Personalized Treatment Plan for Each Patient. Our medical team is comprised of board-certified pulmonologists, certified physician assistants and certified registered nurse practitioners. All have advanced training and knowledge, as well as access to the most advanced technology for the evaluation, diagnosis, and treatment of pulmonary diseases. For those with sleep related issues, our physicians are board certified sleep specialists who diagnose and treat a variety of sleep related respiratory issues. Not only do we diagnosis your initial sleep problems, we continue to monitor and treat your obstructive sleep apnea throughout the course of your CPAP therapy.