Print Departments and specialties Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery. Departments that treat this condition Allergic Diseases Asthma Clinic Asthma Clinic in Allergic Diseases Transplant Center Doctors who treat this condition Edit search filters close Narrow your search By location Jacksonville, FL Rochester, MN By last name There are no doctors whose last name begins with the letter A A There are no doctors whose last name begins with the letter B B Find a doctor whose last name begins with the letter C C There are no doctors whose last name begins with the letter D D There are no doctors whose last name begins with the letter E E There are no doctors whose last name begins with the letter F F There are no doctors whose last name begins with the letter G G Find a doctor whose last name begins with the letter H H Find a doctor whose last name begins with the letter I I There are no doctors whose last name begins with the letter J J There are no doctors whose last name begins with the letter K K There are no doctors whose last name begins with the letter L L There are no doctors whose last name begins with the letter M M There are no doctors whose last name begins with the letter N N There are no doctors whose last name begins with the letter O O There are no doctors whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q There are no doctors whose last name begins with the letter R R There are no doctors whose last name begins with the letter S S There are no doctors whose last name begins with the letter T T There are no doctors whose last name begins with the letter U U There are no doctors whose last name begins with the letter V V There are no doctors whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X There are no doctors whose last name begins with the letter Y Y There are no doctors whose last name begins with the letter Z Z Reset all filters Search Tips Use quotes for phrases. Even if there are no auto-suggestions within the search field, hit "Search" anyway, as you may still get results. Displaying 1-3 out of 3 doctors available Clayton T. Cowl, M.D., M.S. Pulmonologist Occupational Medicine Specialist Rochester, MN Areas of focus: Occupational asthma, Lung disorder Scott A. Helgeson, M.D. Internist Pulmonologist Critical Care Specialist Clinical Informaticist Jacksonville, FL Areas of focus: Bronchoscopy, Right heart catheterization, Bronchoalveolar lavage, Interstitial lung disease, Occupational asthma Leah L. Ishmael, D.O. Allergist-Immunologist Jacksonville, FL Areas of focus: Allergy shot, Nasal endoscopy, Insect bite allergy, Asthma, Immune deficiencies, Food allergy, Drug allergy, Eosinophil...ic esophagitis, Atopic dermatitis, Nasal polyps, Chronic cough, Sinusitis, Occupational asthma, Anaphylaxis, Rhinitis Show more areas of focus for Leah L. Ishmael, D.O. By Mayo Clinic Staff Request an appointment Diagnosis & treatment Feb. 27, 2024 Print Living with occupational asthma? Connect with others like you for support and answers to your questions in the Asthma & Allergy support group on Mayo Clinic Connect, a patient community. Asthma & Allergy Discussions Staying (Lung) Safe this Holiday Season 31 Replies Sat, Dec 20, 2025 chevron-right Anyone have "cough variant" asthma? Vocal cord dysfunction? 40 Replies Mon, Dec 15, 2025 chevron-right Multiple medicine allergic responses 15 Replies Sat, Dec 06, 2025 chevron-right See more discussions Related Products & Services A Book: Mayo Clinic Family Health Book Newsletter: Mayo Clinic Health Letter — Digital Edition Show more products and services from Mayo Clinic Occupational asthmaSymptoms&causesDiagnosis&treatmentDoctors&departments Research: It's all about patients Show transcript for video Research: It's all about patients [MUSIC PLAYING] Joseph Sirven, M.D., Professor of Neurology, Mayo Clinic: Mayo's mission is about the patient. The patient comes first. So the mission and research here is to advance how we can best help the patient, how to make sure the patient comes first in care. So in many ways, it's a cycle. It can start with as simple as an idea worked on in a laboratory, brought to the patient bedside, and if everything goes right — and let's say it's helpful or beneficial — then brought on as a standard approach. And I think that is one of the unique characteristics of Mayo's approach to research — that patient-centeredness — that really helps to put it in its own spotlight. CON-20375754 Diseases & Conditions Occupational asthma