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Mark David Siegel, MD

Pulmonology & Sleep Medicine, Pulmonary Critical Care
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Patient type treated
Accepting new patients
Referral required
From physicians only
Board Certified in
Internal Medicine, Pulmonary Disease , and Critical Care Medicine (Internal Medicine)


Mark D. Siegel, MD, is a critical care pulmonologist who treats patients with pulmonary embolism, septic shock, acute respiratory distress syndrome, and multiple organ dysfunction syndrome (MODS).

Dr. Siegel also sees patients with asthma, chronic obstructive pulmonary disease (COPD), chronic cough, and bronchiectasis.

“I enjoy caring for patients and families and helping them in moments of crisis,” he says. “I tell my patients that we will do our best to make sure they get the best possible care.”

The challenges of caring for patients with life-threatening conditions led him to specialize in pulmonology.

Dr. Siegel sees patients in the Intensive Care Unit (ICU), the pulmonary consult service at Yale New Haven Hospital, and the Winchester Center for Lung Disease.


  • Professor of Medicine (Pulmonary)
  • Program Director, Internal Medicine Traditional Residency Program

Education & Training

  • Fellow
    Yale University School of Medicine (1995)
  • Resident
    Hospital of the University of Pennsylvania (1991)
  • MD
    College of Physicians & Surgeons, Columbia Univ (1988)

Additional Information