John V. Fahy

MD MS

Pulmonologist

Dr. John Fahy is a pulmonologist who has a special interest in treating patients with asthma and serves as director of UCSF’s severe asthma clinic. He also cares for critically ill patients in the intensive care units.

Fahey directs the UCSF Airway Clinical Research Center. His research receives funding from the National Institutes of Health and various foundations, as well as contracts from biotechnology and pharmaceutical companies. The center studies the underlying disease mechanisms of asthma, cystic fibrosis and other airway diseases.

Fahy earned his medical degree at University College Dublin After internal medicine training in Dublin, he completed fellowship training in pulmonary and critical care medicine at UCSF. He joined the faculty in 1993.

He is the Michael S. Stulbarg Endowed Chair in Pulmonary Medicine.

  • Education

    University College, Dublin Ireland, 1985

  • Residencies

    University College Dublin, Internal Medicine, 1989

  • Fellowships

    UCSF, Pulmonary Medicine, 1992

  • Board Certifications

    Internal Medicine, American Board of Internal Medicine

  • Academic Title

    Professor

Conditions I specialize in

  • Severe asthma

Where I see patients (2)

    My reviews

    4.8

    Overall Experience
    52 Ratings
    About our process
    Feb 03, 2023
    Couldn't answer follow up care plan question because diagnostic test results weren't finalized by the time of my appttwo weeks later!
    Dec 30, 2022
    Dr Fahy is an excellent and thoughtful physician
    Dec 25, 2022
    Dr Fahy is the very best medicine can offer! He is a phenomenal doctor and I would. Come from around the world to see him here!
    Nov 18, 2022
    I have met with this provider 4 times since 2017. I don't fit in a particular diagnosis so he doesn't quit know what to do with me. It's frustrating for me but also I think for him.
    Nov 09, 2022
    Excellent
    Oct 14, 2022
    Dr Fahy is very knowledgeable. He is also very concerned about my health and willing to try new medication to improve my condition.
    Sep 09, 2022
    Dr Fahy is the best
    Jul 29, 2022
    Very good doctor
    Feb 25, 2022
    This was a very interactive visit.
    Jan 23, 2022
    Good
    Dec 20, 2021
    Excellent experience.
    Nov 03, 2021
    Good experience
    Oct 09, 2021
    Dr Fahy is outstanding. He genuinely cares about his patients
    Jul 16, 2021
    I'm extremely fortunate to have Dr. Fahy provide my pulmonary care. His expertise is far superior to that of any other pulmonologist I have gone to. And he is a very compassionate doctor who is totally committed to the patient's well being.
    Jun 25, 2021
    Dr Fahy is an excellent doctor - extremely knowledgeable about his area of medicine skilled efficient and genuinely cares about his patients. This is a rare combination. I know he is very busy but he always takes time to listen to me discuss my symptoms explain his findings about tests and diagnoses and present the relevant treatment options. I prefer that medical information regarding my health not be dumbed down and he respects this and intuitively knows that I want all the information presented to me in a logical fashion. A true pleasure to work with regarding my health.
    May 29, 2021
    Absolutely the best

    Selected research

    Decorative Caduceus

    Severe Asthma Research Program

    Pulmonary function test results include forced expiratory volume in one second (FEV1) and forced vital capacity (FVC).

    Recruiting

    Decorative Caduceus

    Impact of Metabolic Dysfunction and Mucus Plugging on Asthma Physiology

    We will compare change in EELV during the CPET (Cardiopulmonary Exercise Test) between the obese asthma patients with MD or without MD and between the patients with severe asthma with mucus plugs or without mucus plugs.

    Recruiting

    Decorative Caduceus

    Tissue Immune Interaction in Nasal Polyposis

    This study enrolls chronic rhinosinusitis patients with and without nasal polyps. Investigators aim to compare the percentage of ILC2 and tuft cells present in nasal tissue and secretions between those who present with nasal polyp...

    Recruiting

    Decorative Caduceus

    Lung Function Outcomes Following Removal of Airway Mucus Plugs in Patients With Asthma (FOCUS)

    We will assess change from baseline FEV1 one week after and six months after removal of mucus plugs by bronchoscopy.

    Recruiting

    Decorative Caduceus

    PrecISE (Precision Interventions for Severe and/or Exacerbation-Prone Asthma) Network Study

    Assessed prior to bronchodilator administration. Efficacy analyses will compare the end-of-period outcome values between test treatment and placebo.

    Recruiting

    Decorative Caduceus

    Blood Lymphocytes in Asthmatics Treated With Therapeutic Proteins

    The investigators will compare lymphocyte counts in healthy controls to asthmatics on and off therapeutic proteins.

    Recruiting

    Decorative Caduceus

    CF And Effects of Drugs Mixed Ex Vivo With Sputum for Mucolytic Treatment

    Recruiting

    Decorative Caduceus

    The Effect of NAC on Lung Function and CT Mucus Score

    The primary outcome is the % change in FEV1 from the start to the end of each two-week treatment period (either placebo or 20% NAC).

    Recruiting

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