Darya Soto, M.D.

Dr. Soto is Board Certified in Pulmonary and Sleep Medicine. She completed her Fellowship in 2000 at the University of California, San Francisco, where she then became an Assistant Professor of Medicine in the Department of Pulmonary and Critical Care, and conducted basic-science research in lung cancer.  She is currently the Founder and Medical Director of Pulmonary and Sleep Associates of Marin.  She also directs the Pulmonary Function Lab and the Pulmonary Rehabilitation Program for the practice. Dr. Soto is a Board Member of Meritage Medical Network and a Medical Advisor for Somnoware.  She is a proud member of the NAACP. 

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Ali Massoumi, M.D.

Dr. Massoumi is Board Certified in Pulmonary and Critical Care Medicine. He completed his Fellowship at Georgetown University.. He joined our practice August of 2015. He does Pulmonary and Critical Care consultations at Novato Community Hospital, where he is the Medical Director of Respiratory Services. Dr. Massoumi grew up in Marin and enjoys spending time with his wife and 2 small children.

Rafael Sepulveda, M.D.

Dr. Sepulveda is Board Certified in Internal Medicine and Sleep Medicine. He completed his Sleep Fellowship at the University of Tennessee Health Science Center. in 2017. He was trained in both Adult and Pediatric Sleep Medicine, rotating in busy hospitals such as Memphis Veterans Medical Center and Le Bonheur Children's Hospital. He joined our practice August 2017. He grew up in Puerto Rico and enjoys traveling, sunny beach days and outdoor activities.