Dedicated to One Thing: Your Food Freedom
Wisconsin Food Allergy Institute was founded on a simple belief: families living with food allergies deserve more than “just avoid it.”
For too long, avoidance was the only option. Parents were handed an EpiPen, a list of foods to fear, and sent home to figure it out. Children grew up missing birthday parties, sitting at separate lunch tables, and learning that they were “different.”
We knew there had to be a better way.
Today, food allergy immunotherapy is changing lives. OIT and SLIT are evidence-based treatments that help patients build tolerance to their allergens — reducing the risk of severe reactions and giving families something they never thought possible: freedom.
Wisconsin Food Allergy Institute exists to bring that freedom to Southeast Wisconsin. We are the region’s only practice dedicated exclusively to food allergy immunotherapy — and we’re here to help your family write a different story.
Our Mission
Our Vision
To transform the lives of children and adults
with food allergies through safe,
proven immunotherapy treatments
and compassionate, personalized care.
A world where food allergies no longer control lives
— where families eat together without fear,
children celebrate without limits,
and “What if?” is replaced with “We can.”
What we Believe
Food freedom is possible.
Avoidance manages risk. Treatment changes lives. We believe every patient deserves the chance to live without constant fear.
Families deserve options.
You should know what's possible — not just what's conventional. We educate, guide, and support families in making the right choice for them.
Compassion is clinical.
We treat patients, not charts. We understand the emotional weight of food allergies because we see it every day. Our care starts with listening.
Access matters.
Long wait times and 3-hour drives shouldn't stand between families and treatment. We're local, we're accessible, and we're here when you need us.
Meet Our Team
Dr. Sudip Ringwala
Medical Director
Dr. Ringwala is dedicated to one thing: helping patients reclaim their quality of life from allergies. With expertise spanning both pediatric and adult allergy care, he brings a patient-first approach to every consultation.
• Assistant Clinical Medical Professor Chicago Institute of Medicine
• Medical Degree: Arizona College of Osteopathic Medicine, Midwestern University (Glendale, AZ)
• Residency: Internal Medicine, Southampton Hospital (Southampton, NY)
• Fellowship: Allergy & Immunology, Larkin Hospital of Nova Southeastern University (South Miami, FL)
Katherine Johnson
Nurse Practitioner
Katherine Johnson is passionate about empowering patients to take control of their health through compassionate, personalized care.
As a board-certified Advanced Practice Nurse Practitioner, she brings a patient-first philosophy to every interaction—taking time to listen, educate, and support families throughout their allergy journey. Working closely with Dr. Ringwala, Katherine ensures seamless continuity of care and helps patients of all ages achieve optimal health outcomes.
• Bachelor of Science: Biology, Beloit College
• Master of Science: Nursing, Alverno College
• Post-Master's Certificate: Family Nurse Practitioner
• Board-Certified Advanced Practice Nurse Practitioner
Ready to Learn More?
Your journey to food freedom starts with a conversation. We'll answer your questions,
explain your options, and help you decide if treatment is right for your family.