Said Mostafavi, M.D., FCCP, FAASM, stands as a distinguished figure in the realms of pulmonary and sleep medicine. Board-certified and recognized as a pioneer in sleep medicine in Southern California, Dr. Mostafavi brings a wealth of expertise in diagnosing, treating, and managing a comprehensive range of sleep-related and respiratory conditions. His areas of expertise encompass, but are not limited to, sleep apnea, snoring, chronic cough, asthma, COPD, bronchitis, shortness of breath, pneumonia, daytime sleepiness, insomnia, narcolepsy, pulmonary hypertension, emphysema, and interstitial lung disease.

Dr. Mostafavi’s academic journey includes having completed training in Pulmonary, Critical Care, and Sleep Medicine at UCLA. Dr. Mostafavi further honed his skills in Sleep Medicine at Cedars-Sinai Medical Center, mentored by the globally acclaimed sleep specialist, Dr. Philip Westbrook.

In response to the growing prevalence of sleep disorders and the scarcity of specialized treatment facilities in Southern California, Dr. Mostafavi established his inaugural sleep diagnostic center in Encino in 1998. Demonstrating visionary leadership, he expanded his sleep diagnostic enterprise to nine cities across Southern California, thereby creating the region's most extensive network for sleep medicine diagnostics and treatment.

In 2021, Said Mostafavi, M.D., FCCP, FAASM, ventured into a new endeavor by establishing Century Sleep Inc. Under his guidance, Century Sleep Inc. offers a comprehensive suite of sleep diagnostic services, catering to a wide spectrum of sleep disorders. These services include home sleep studies, in-center studies, Multiple Sleep Latency Test for assessing excessive daytime sleepiness and narcolepsy, PAP device evaluation, and evaluation of alternative treatments to CPAP for Obstructive Sleep Apnea.

Century Sleep Inc. operates seven nights a week, ensuring accessibility and convenience for patients. The center has also formed partnerships with all major PPO insurances, Medicare, and some of the leading medical groups and health delivery organizations in the area, including UCLA Health, Cedars-Sinai Medical Group, and Providence. This collaboration underscores Century Sleep Inc.'s reputation for quality care and excellence in sleep diagnostics and treatment services.

Dr. Mostafavi's contributions to the medical community extend beyond clinical practice. He is an esteemed author, having published articles in revered peer-reviewed journals such as Chest and Respiration. As a sought-after speaker, he frequently lectures on the monitoring, diagnosis, and treatment of sleep disorders. His expertise has also been showcased on various media platforms, including NBC, CNN, KCAL 9 News, KNX 1070, and television programs like ‘The Biggest Loser’ and ‘Extra’.

An influential mentor, Dr. Mostafavi has shaped the careers of many sleep specialists and technologists who now hold prominent positions in the field. His contribution to sleep medicine is further evidenced by his previous role on the Board of Directors of the California Sleep Society.

Currently, Dr. Mostafavi also dedicates his time to nurturing future medical professionals as a member of the clinical faculty at both the UCLA David Geffen School of Medicine and Cedars-Sinai Medical Center as well as running Century Sleep, Inc. and his private practice in West Los Angeles.


  • Double-board certified in Sleep Medicine by:
         - American Board of Sleep Medicine (ABSM)
         - American Board of Internal Medicine (ABIM)
  • American Board of Internal Medicine, Pulmonary Diseases
  • Board certified in Internal Medicine
  • Fellow of The American Academy of Sleep Medicine (AASM)
  • Fellow of The American College of Chest Physicians (ACCP)
  • Clinical Faculty at UCLA School of Medicine
  • Board Member for The California Sleep Society (CSS)
"Approximately 1 in 15 adults in the US are afflicted with moderate to severe sleep apnea. The good news is that there is effective, non-invasive, non-pharmacological treatment."
Years Experience
in sleep and pulmonary medicine
from accredited medical communities
Patient Review
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