Southwest Allergy & Asthma Center

Mission Statement

As a multi-state, physician-led team of specialized providers and dedicated staff, we are focused on enhancing the well-being of our patients living with allergy, asthma, and sinus conditions. Our mission is simple: to empower individuals to embrace life to the fullest through personalized, comprehensive, and compassionate healthcare.

Our Future

To be the unparalleled provider for allergy, asthma, and sinus patients; empowered by the best-in-class professionals who will reshape the delivery of exceptional patient-centered healthcare.

What can you expect from a visit?

Personalized and collaborative care is the priority at Southwest Allergy & Asthma Center. Allergies, asthma, and sinus complications are often related, so the first step to breathing easier starts with an allergy consultation to determine the best course of action. Our commitment to excellence is reflected in our three core principles:

  • Patient-Centric Approach: We prioritize you, understanding unique needs and providing timely, compassionate care.
  • Accurate Diagnosis: Utilizing advanced technologies, we ensure precise diagnostics, from needle-free skin tests to in-house CT scanning.
  • Results-Driven Treatment: Our Board-Certified physicians design effective, easy-to-follow plans, minimizing medication, and ensuring ongoing follow-up for optimal results. Your well-being is our priority.

Our specialists can help you effectively manage your symptoms.

Meet the providers

Benefits of Choosing Southwest Allergy & Asthma Center

Discover top-tier respiratory care with SW Allergy, where our commitment to excellence shines through in every aspect of your well-being. Explore our specialized services designed for expert care:

Pulmonary Function Testing

Experience expert respiratory care utilizing cutting-edge tools for a rapid and painless diagnosis of lung disorders such as asthma and COPD. Obtain results in just one minute, ensuring a swift and effective therapy plan.

Nasal Endoscopy and CT Scan

Benefit from on-site CT scans in just 10 seconds for efficient sinus evaluation, saving you time and costs. Our pediatric-sized endoscope ensures detailed nasal visualization, making exams swift and virtually painless with the use of localized anesthesia. Our state-of-the-art nasal endoscope allows for clear visualization of conditions such as large adenoids, nasal polyps, deviated septum, vocal cord nodules, throat cancer, and abnormal vocal cord movements.

Exercise Challenges

Navigate monitored challenges designed to pinpoint exercise-induced respiratory conditions. Utilize breathing tests and, if necessary, undergo limited endoscopy for vocal cord concerns. Place your trust in us for precise assessments and personalized treatment plans.

Book an appointment

Build a comprehensive treatment plan with our providers by calling one of our offices or requesting an appointment.


Request an appointment

Meet Our Founder

John Van Wagoner, M.D.

Dr. Van Wagoner has been in practice since 1999 and specializes in adult and pediatric allergy, asthma and respiratory illness. Specific areas of interest include the diagnosis and treatment of allergy (respiratory, food, insect, and drug), asthma, eczema, respiratory illnesses, and chronic sinus disease.

Medical degree:

  • University of Texas Southwestern Medical School


  • University of Florida Medical School, Department of Pediatrics


  • University of Texas Southwestern Medical School