Physicians/Providers

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Sean Barry, M.D., FACCP

Medical School: University of Nebraska College of Medicine

Residency: University of Nebraska Medical Center, Internal Medicine

Board Certifications: American Board of Internal Medicine, Critical Care; American Board of Internal Medicine, Pulmonary Disease; American Board of Internal Medicine

Special Interests: Critical Care; Sleep Medicine; Medical Director for Madonna Hospital – Pulmonary; Medical Director for Ambassador Lincoln

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Timothy Lieske, M.D., FACCP

Dr. Lieske is a graduate of the University of Nebraska College of Medicine. He completed his Residency at SW Michigan Area Health Education Center. Dr. Lieske is Board Certified by the National Board of Medical Examiners, American Board of
Internal Medicine, Pulmonary, and is a Board Certified Sleep Specialist. Dr. Lieske is the Director of the BryanLGH Sleep Center and Co-Director of BryanLGH Medical Center Intensivist Program.

Medical School: University of Nebraska College of Medicine

Residency: SW Michigan Area Health Education Center, Internal  Medicine

Board Certifications: National Board of Medical Examiners; American Board of Internal Medicine; Pulmonary Board Certification; Board Certified Sleep Specialist

Special Interests: Critical Care; Sleep Medicine; Director of Bryan Sleep Center; Co-Director of Bryan Medical Center Intensivist Program

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Michelle Tyser, PA-C

Michelle Tyser is a graduate of Union College. Michelle is certified through the NCCPA. Michelle is a board member of the Concerned Nebraskans for Cystic Fibrosis. Michelle has been employed with Lincoln Pulmonary & Critical Care Associates since 2005.

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Sarah Eckles-Van Horn, MSN, APRN-NP, BC

Sarah started her career in healthcare as a Registered Nurse, graduating nursing school in 1998. She continued her education while working as an Orthopaedic, then Critical Care nurse. She graduated in 2005 with her Masters of Science in Nursing with a focus on Acute, Adult health. She has worked as a Trauma Nurse Practitioner and joined Lincoln Pulmonary & Critical Care in the fall of 2013. She is an active member of several Nurse Practitioner organizations and enjoys precepting future Nurse Practitioners.

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Maran Avery MPAS, PA-C, RRT

Maran Avery is a graduate of Union College with her Masters of Physician Assistant Studies. Her undergraduate work includes a degree in Biology from the University of Nebraska at Omaha, and a degree in Respiratory Care from Methodist College in Omaha. She is a veteran of the USAF and served as a medic for seven years. She is a member of the AAPA. Maran has been with Lincoln Pulmonary and Critical Care Associates since June, 2015.