Dr. William Busse

Sameer Mathur, MD, PhD, is an allergist and immunologist at UW Health and an associate professor in the Department of Medicine at the University of Wisconsin School of Medicine and Public Health, Division of Allergy, Pulmonary and Critical Care Medicine. He treats adults with a variety of allergic conditions, including allergic rhinitis, asthma, diseases of the esophagus, hives, food allergies, drug allergies and some types of immune deficiencies.When working with patients, Dr. Mathur first tries to understand their personal goals for treatment. He then educates them about their condition and possible treatment strategies so they can partner to make informed decisions about their care.Although it’s not always possible to find a definitive answer, Dr. Mathur is committed to investigating what exactly is causing an allergic reaction. His current research focuses on understanding how the eosinophil (a type of white blood cell) contributes to allergic diseases, particularly eosinophilic esophagitis and severe asthma.Outside of work, Dr. Mathur enjoys playing tennis, pickleball and other racquet sports. He also enjoys biking on the Dane County trails and exploring the state. Dr. Mathur is highly rated in 16 conditions, according to our data. His clinical expertise encompasses Hypereosinophilic Syndrome, Hives, Eosinophilic Asthma, and Chronic Spontaneous Urticaria (CSU). Dr. Mathur is board certified in Allergy & Immunology.

Ravi Viswanathan, MD, is a UW Health allergist and immunologist and an associate professor in the Department of Medicine at the University of Wisconsin School of Medicine and Public Health. He sees adult patients with a variety of allergies, asthma and immunologic disorders.Dr. Viswanathan diagnoses and treats a wide range of allergic diseases, including seasonal allergies, food allergies, asthma, hives and swelling. As an immunologist, he cares for patients with conditions caused by insufficient immune system function. He specializes in drug allergies, mast cell disorders (abnormal immune cell growth), eosinophilic disorders (overproduction of a certain type of white blood cell) and seasonal allergies.Dr. Viswanathan believes that long-term solutions stem from active listening and shared decision-making. He takes time to get to know his patients and works with them to create tailored, precision-based treatments. Above all, he strives to build lasting relationships with his patients based on trust and efficiency.In addition to his clinical work, Dr. Viswanathan researches new therapeutic methods to manage conditions that cause hives and swelling.In his free time, Dr. Viswanathan enjoys playing tennis and exploring national parks with his family.I strive to be an effective bridge connecting science and medicine to the person in front of me. Dr. Viswanathan is highly rated in 13 conditions, according to our data. His clinical expertise encompasses Hives, Chronic Spontaneous Urticaria (CSU), Angioedema, and Eosinophilic Pneumonia. Dr. Viswanathan is board certified in Allergy & Immunology and Internal Medicine.

Anne Marie Singh, MD, is a UW Health Kids pediatric allergist and an associate professor and interim division chief in the Division of Allergy, Immunology and Rheumatology within the Department of Pediatrics at the University of Wisconsin School of Medicine and Public Health.Dr. Singh diagnoses and treats children with a wide range of allergic diseases, including atopic dermatitis (eczema), food allergies, asthma, allergic rhinitis (hay fever), itchy eyes and nose, hives and other immune system disorders.Dr. Singh’s special interests include feeding difficulties, food allergies and eczema. To advance patient care, she actively researches what triggers allergies and asthma and why some children are at higher risk.Dr. Singh’s care philosophy is to build a partnership with her patients and their families. With care and compassion, she listens closely to their concerns and provides education. After a thorough physical exam and any necessary testing, she recommends treatment options personalized to meet each patient’s needs.Dr. Singh feels privileged to work with children and is optimistic about new treatments and therapies that prevent these allergic disorders in the first place.During her free time, Dr. Singh enjoys figure skating and playing the oboe in the University of Wisconsin School of Medicine and Public Health orchestra.With excellent medical care, we help children thrive and enjoy happy lives — despite their allergies or asthma. Dr. Singh is highly rated in 2 conditions, according to our data. Her clinical expertise encompasses Food Allergy, Anaphylaxis, Hyper IgE Syndrome, and Autosomal Dominant Hyper IgE Syndrome. Dr. Singh is board certified in Allergy & Immunology.