Our Physicians

Dr. Roman Culjat (pronounced Chool-yot) has been practicing Pulmonary and Sleep Medicine since finishing training in 2007. He primarily works in the office in Torrance, and he also sees hospital patients with pulmonary and sleep issues at Providence Little Company of Mary Medical Center, Torrance, and Torrance Memorial Medical Center. He has board certifications in Pulmonary Disease and Sleep Medicine. Dr. Culjat enjoys seeing a diverse patient population and believes in equity for all patients.

Dr. Caleb Hsieh is a pulmonary, critical care and sleep medicine physician who practices in Torrance. He sees patients with a wide range of conditions, from asthma and COPD to sleep apnea and insomnia. He works to explain and translate evidence-based medicine to patients in a way that empowers them to make informed decisions. He is triple board-certified in internal medicine, pulmonary medicine, and critical care, and is board-eligible for sleep medicine.

Dr. Catherine Oberg is a board-certified interventional pulmonologist who practices in Torrance. She performs a variety of diagnostic and therapeutic respiratory system procedures, and always works with patients to find the least invasive option that aligns with their goals of care. Her clinical interests include minimally invasive diagnostic procedures, bronchoscopic lung volume reduction and central airway obstruction.