Jonathan Koff, MD


Internal Medicine, Pulmonary Disease Medicine

Conditions & Treatments

Bronchiectasis, Cystic Fibrosis, Lung Transplant, Pulmonary Infectious Diseases

(203) 785-4198
Accepting New Patients
Telehealth Visits


Jonathan Koff, MD, a pulmonary and critical care physician, is director of the Yale Medicine Adult Cystic Fibrosis Program. He chose pulmonary medicine in part because his grandfather had emphysema. “I wanted to better understand how the disease affected him,” he says.

Dr. Koff was drawn to cystic fibrosis, which is usually diagnosed in childhood, because he was intrigued by the complexity of this genetic disease, which causes recurrent lung infections, and digestive and nutritional problems, among other issues. He works with a multidisciplinary team that includes a nurse, a nutritionist, a physical therapist, a social worker, and respiratory therapists. “We continue to see our patients do better clinically with the multidisciplinary team-based care approach,” he says. He is optimistic about new treatments for cystic fibrosis, such as recently approved therapies that target specific genetic mutations.

An associate professor of medicine (pulmonary) at Yale School of Medicine, Dr. Koff also works in the medical intensive care unit at Yale New Haven Hospital, and conducts laboratory and translational research that focuses on viral infections in asthma and cystic fibrosis. He serves on the board of the Connecticut Chapter of the Cystic Fibrosis Foundation. 





Years In Practice


Affiliated With

Yale Medicine


Yale Medicine Pulmonology/Critical Care

789 Howard Avenue
Winchester Chest Clinic - 2nd Floor
New Haven, CT 06519

Get Directions

Monday8:00 AM - 5:00 PM
Tuesday8:00 AM - 5:00 PM
Wednesday8:00 AM - 5:00 PM
Thursday8:00 AM - 5:00 PM
Friday8:00 AM - 5:00 PM
(203) 785-4787

Yale Medicine Pulmonology/Critical Care

20 York Street
New Haven, CT 06510

Get Directions

Monday9:00 AM - 5:00 PM
Tuesday9:00 AM - 5:00 PM
Wednesday9:00 AM - 5:00 PM
Thursday9:00 AM - 5:00 PM
Friday9:00 AM - 5:00 PM
(203) 785-3826

Education & Training


Hamilton College;Case Western Reserve University School of Medicine


Brown University


University of California San Francisco

Accepted Insurance

Insurance coverage regularly changes, please contact the doctor’s office directly to verify that your specific insurance plan is accepted.

  • aetna
  • anthem bc/bs
  • berkeley care network
  • cigna healthcare
  • community care network
  • connecticare
  • corvel
  • first health network
  • focus healthcare
  • great west
  • husky
  • medicaid
  • medicare
  • multiplan
  • oxford health plans
  • railroad medicare
  • tricare/champus
  • united healthcare
  • us family health plan
  • wellcare