Dr. Michael Weinstein is Pulmonary and Sleep Medicine specialist with more than 15 years of experience.  He comes to Advocare Pulmonary and Sleep Specialists from Delaware County Memorial Hospital where he served as the section chief of Pulmonary, Critical Care and Sleep Medicine.  

Dr. Laura Ferguson is originally from Syracuse, NY; although her education and medical training have brought her to many cities in the northeast, she now considers Philadelphia her home. She graduated from the University of Rochester in 2007 with a BS in Biomedical Engineering then an MS in Biomedical Engineering in 2009. Dr. Ferguson earned her Doctor of Medicine degree from New York Medical College in 2013.

Dr. Mitchell Jacobs joins Advocare Pulmonary and Sleep Specialists following over 5 years in clinical practice in Bucks County. He is a board-certified pulmonologist with a keen interest in understanding and treating a range of pulmonary and sleep disorders including COPD, asthma, bronchiectasis, interstitial lung disease, chronic cough, shortness of breath, obstructive sleep apnea, and more. Dr. Jacobs is dedicated to providing high-quality patient care. He brings an individualized approach to medicine, assessing each patient’s needs and values and working to develop a thoughtful, comprehensive plan of care.

Dr. Gerard Diefes graduated from La Salle University in 1988 with a BA in Biology. He then received his Doctor of Medicine degree from Hahnemann University in 1992. Dr. Diefes continued his training at Hahnemann in Internal Medicine, Pulmonary, Critical Care, and Sleep Medicine, finishing in 1998. For the last 27 years, he owned a successful private practice, holding academic affiliations with Hahnemann University and Pennsylvania College of Osteopathic Medicine. During this time, Dr. Diefes was responsible for training Internal Medicine residents and Pulmonary/Critical Care fellows. He has won several teaching awards and enjoys educating future physicians. He is currently board-certified in Pulmonary, Critical Care, and Sleep Medicine. Dr Diefes treats a wide variety of pulmonary diseases, focusing on asthma, COPD, and sleep disorders while valuing patient education and quality care.

Maria Cornacchione is an American Nurses Credentialing Center (ANCC) board-certified Nurse Practitioner with 13 years of experience in the healthcare field.  Maria graduated in 2010 with a Bachelor of Science Degree in Nursing from The Pennsylvania State University.  She spent the next 7 years working as registered nurse in various acute care settings, including medical, surgical, and acute stroke rehabilitation.  After developing a strong foundation of clinical experience, she pursued a career as a Nurse Practitioner.   

Elizabeth Hedrick is a certified physician assistant through the National Commission on Certification of Physician Assistants (NCCPA). Lizzy completed her college education in the five-year BS/MS physician assistant program at King's College in Wilkes-Barre, PA. In May 2021, she graduated cum laude with her Bachelor of Science in Medical Studies and Minor in Neuroscience. Lizzy completed clinical rotations throughout eastern Pennsylvania and New York, gathering comprehensive experience in a myriad of specialties. In August 2022, she graduated with her Master of Science in Physician Assistant Studies (MS.PAS).