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Dr. Keith D. Rigsby is an Internal Medicine Specialist . He graduated with honors from the University of Tennessee Health Science Center, College Of Medicine in 2003.

Dr. Rigsby has spent more than 17 years practicing medicine and he’s been working in the Dallas-Fort Worth Metroplex and surrounding communities in all aspects of medicine. 

He began his career in Aesthetic Medicine in 2021 with Forever29 MedSpa.

For Dr. Rigsby health and family are a priority. He’s a loving husband and now the proud father of two children.

Tayler Long, MD, is a board-certified pulmonologist at Southwest Pulmonary Associates in Plano, Texas. He is committed to providing excellent pulmonary and critical care medicine to the community. 

Dr. Long earned his Bachelor of Arts in Human Biology from Stanford University in Palo Alto, California, before completing his Doctor of Medicine at the University of California, San Diego School of Medicine. He went on to complete both his residency in Internal Medicine and his fellowship in Pulmonary and Critical Care Medicine at the prestigious UT Southwestern Medical School in Dallas, Texas.

In addition to his clinical training, Dr. Long holds a Master of Science in Healthcare Leadership and Management from UT Dallas, equipping him with the tools to lead effectively in today’s evolving healthcare landscape. His advanced education and years of experience allow him to offer expert care in managing complex lung diseases, respiratory failure, and critical illness.

Dr. Long joined Southwest Pulmonary Associates in 2007. He has served as President of the Medical Staff at Texas Health Plano and currently holds leadership roles on the Medical Executive Committee at Texas Health Frisco. He also serves as the Director of the ICU at Texas Health Frisco, reflecting his commitment to both patient care and institutional excellence. He is has been recognized as one of D Magazine's Best Docs repeatedly, most recently in 2025.

Outside of medicine, Dr. Long is a devoted husband and father. He is married and enjoys spending time with his three beautiful children.

Mark Robertshaw, MD, is a board-certified pulmonologist and critical care medicine specialist proudly serving patients in Plano, Texas. He joined Southwest Pulmonary Associates in 2023, bringing with him a wealth of clinical experience and a compassionate, patient-centered approach to care.

Dr. Robertshaw completed his fellowship in Pulmonary and Critical Care Medicine at UT Southwestern Medical Center in Dallas, Texas, where he was honored to serve as Chief Fellow during the 2022–2023 academic year. He completed his residency training at Duke University Hospital in Durham, North Carolina, and earned his medical degree from the University of Missouri in Columbia. His academic journey began at the University of Notre Dame in South Bend, Indiana, where he received his Bachelor of Science and developed a lifelong passion for Fighting Irish football.

Board certified by the American Board of Internal Medicine in both Pulmonary Medicine and Critical Care Medicine, Dr. Robertshaw is committed to helping patients manage a wide range of respiratory conditions with leading-edge diagnostic tools and individualized treatment plans. His dedication to community service has been recognized with prestigious honors, including the President’s Volunteer Service Award and the Congressional Award, both received in 2013.

Outside the clinic, Dr. Robertshaw enjoys spending quality time with his wife and daughter, golfing, and cheering on his alma mater during college football season. He looks forward to building long-lasting relationships with his patients and their families throughout the Plano community.

Ross Schumacher, MD, is one of the skilled pulmonologists practicing at the Southwest Pulmonary Associates location in Plano, Texas. He is a versatile and compassionate pulmonary physician who joined Southwest Pulmonary Associates in 2023. His medical journey encompasses intensive care expertise and long-term patient relationships.

Dr. Schumacher completed his undergraduate studies at Indiana University in Bloomington, Indiana. He then went on to complete his Doctor of Medicine at the Indiana University School of Medicine in Indianapolis. He completed his fellowship at the University of Alabama at Birmingham (UAB) and his residency at the University of Texas-Southwestern. He earned the Critical Care Fellow of the Year at UAB in 2022 and the House Officer of Excellence at UT Southwestern in 2019. 

Dr. Schumacher is board-certified in Internal Medicine, Critical Care Medicine, and Pulmonary Medicine by the American Board of Internal Medicine. He has also been a member of CHEST and the American Thoracic Society (ATS) since 2020. Additionally, Dr. Schumacher is an advanced bronchoscopist with a focus on the robotic sampling of micronodules. 

Outside of medicine, Dr. Schumacher finds joy in his family—married to Victoria in 2020, welcomed son Dean Wilder in 2021—and a loyal dog named Hoosier. Dr. Schumacher's interests span from Kurt Vonnegut's literature to Immanuel Kant's philosophy. He's dedicated to evidence-based medicine, writing, and passionately cheering for the Hoosiers and Cowboys sports teams.

To schedule an appointment with Dr. Schumacher and the Southwest Pulmonary Associates team, call the office or request an appointment online today.

Kenney Weinmeister, MD is a highly experienced and board-certified pulmonologist, and critical care specialist who has been serving the community of Dallas, Texas, with distinction since 1993 as a member of Southwest Pulmonary Associates. With decades of clinical expertise and a strong academic foundation, Dr. Weinmeister is committed to delivering personalized, comprehensive care for patients with a range of respiratory and sleep-related conditions.

Dr. Weinmeister earned his Bachelor of Science in Pharmacy from Southwestern Oklahoma State University in Weatherford, Oklahoma, and went on to complete his Doctor of Medicine at the University of Oklahoma College of Medicine. He pursued fellowship training in Pulmonary and Critical Care Medicine at UT Southwestern Medical School in Dallas, one of the country’s premier academic institutions. Further enhancing his expertise in healthcare management, he also earned a Master of Business Administration (MBA) from the University of Texas at Dallas.

Dr. Weinmeister has been the recipient of D Magazine's Best Docs recogniztion several times, most recently in 2025. 

He holds board certifications in Pulmonary Medicine, and Critical Care Medicine. His clinical interests include robotics bronchoscopies with early diagnosis and treatment of complex sleep disorders, as well as chronic respiratory illnesses such as asthma, COPD, interstitial lung disease, and respiratory failure.

Dr. Weinmeister is known for his thorough, compassionate approach and his dedication to improving his patients’ long-term health and quality of life. His blend of clinical excellence and leadership continues to make him a trusted resource in pulmonary and sleep medicine across Dallas and beyond.

Rebecca Doebele, MD, is a board-certified pulmonologist and critical care specialist who has been providing expert respiratory care to patients in Dallas, Texas, since joining Southwest Pulmonary Associates in 2008. Known for her compassionate approach and clinical excellence, Dr. Doebele treats a wide range of pulmonary conditions, including asthma, COPD, interstitial lung disease, and critical illnesses requiring intensive care.

Dr. Doebele earned her Bachelor of Science in Genetics from Texas A&M University in College Station before completing her Doctor of Medicine at the University of Texas Southwestern Medical School in Dallas. She remained at UT Southwestern for her residency in Internal Medicine, then pursued advanced fellowship training in Pulmonary and Critical Care Medicine at the University of Colorado Health Science Center.

Board-certified in both Pulmonary Medicine and Critical Care Medicine by the American Board of Internal Medicine, Dr. Doebele has been repeatedly recognized for her clinical skill and dedication to patient care. She was named a Super Doctors Rising Star in 2012 and has earned the prestigious Texas Super Doctors distinction annually from 2013 to the present. Additionally, she received the “Physician All-Star” award from the nursing and administrative staff at Texas Health Presbyterian Hospital of Dallas, a testament to her leadership and collaboration in the hospital setting. Dr. Doebele has been recognized as one of D Magazine’s best doctors in 2021, 2023, and 2024. She also serves as the ICU Medical Director at Texas Health Dallas. 

Outside of medicine, Dr. Doebele enjoys traveling and spending time with her husband and their three children. She is proud to serve the Dallas community and is committed to helping her patients breathe easier and live healthier lives.