Our Staff

All professionals at Collin County Pulmonary Associates maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.

Timothy R. Chappell, MD.

Established in 1985 by Timothy Chappell, MD our pulmonary practice focuses on the diagnosis and treatment of pulmonary diseases and conditions such as COPD, asthma, sarcoidosis, pulmonary fibrosis, chronic cough, pneumonia and lung cancer. In addition, we specialize in the diagnosis and management of sleep apnea and related sleep disorders.

Located in Plano, TX, Dr. Timothy Chappell treats patients in the Dallas, Frisco and Plano communities. The office of Dr. Chappell specializes in a wide range of lung related conditions and sleep disorders. As a specialty practice, our diagnosis and treatment plans are provided for adults over the age of 18 and include the following conditions in the areas of:

Dr. Tim Chappell graduated from the University of Nebraska College of Medicine Summa Cum Laude and moved to Dallas for postgraduate training.  He did his internship and residency in Internal medicine and a fellowship in Pulmonary Medicine at UT Southwestern.  He then was appointed to the faculty of UT Southwestern Medical School as an Assistant Professor of Medicine.  In addition to teaching at Parkland and clinical research at the medical school, he also served as Medical Director of Respiratory Care and Assistant Chief of Pulmonary at the Veterans Administration Medical Center in Dallas.

Dr. Chappell’s research at the Medical School has been published in numerous professional journals and he has been an invited lecturer for prestigious organizations such as the American Thoracic Society, the American Federation of Clinical Research, the American Heart Association and the American Lung Association.

Dr. Chappell established his practice in Plano in 1985.  He is a past Chief of the Medical Staff at The Medical Center of Plano where he also served on the hospital Board of Trustees.  He is Medical Director of Respiratory Care at Collin County Community College.  Please see his curriculum vitae for additional details.


Timothy Betz, MD

Bio coming soon.