Dr. Kathy Sietsema graduated the medical school from the Northwestern University Feinberg School of Medicine and completed her residency program at the University of Washington. A fellowship followed at the Harbor - UCLA Medical Center soon after that. Dr. Sietsema is specialized in pulmonology and board certified in critical care medicine, internal medicine, and pulmonary disease. She has been in practice for more than 20 years and is affiliated with the Ronald Reagan UCLA Medical Center. During her career, she has also contributed to various publications of medical interest.