San Antonio’s Trusted Immunodeficiency Specialists

Systematic Assessments and Compassionate Care for Immune System Disorders.

Tired of getting sick all the time? We help you uncover the cause of frequent infections and develop a treatment plan to strengthen your immunity and restore your health.

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What Is Immunodeficiency?

Immunodeficiency is a condition where the immune system's ability to respond to pathogens is impaired, leading to increased susceptibility to infections and delayed recovery. In some cases, it can result in serious health complications.

What Is Primary Immunodeficiency?


Primary immunodeficiency (PI) is an inherited condition and not caused by external factors. 

People with PI are more likely to experience frequent, severe, or long-lasting infections. While some cases appear in infancy, others may not show symptoms until later in life.

Those at higher risk include:

  • Individuals with a family history of immunodeficiency
  • Children with repeated infections
  • Adults with unexplained, recurring illness

What Is Secondary Immunodeficiency?


Secondary immunodeficiency develops later in life due to external factors that weaken the immune system. Common causes include:

  • Chronic illnesses such as cancer, HIV, or diabetes
  • Medical treatments like chemotherapy, radiation, or long-term steroid use
  • Medications that suppress the immune system
  • Malnutrition or vitamin deficiencies
  • Aging and natural immune decline
  • Chronic stress or poor sleep over time

Because it is acquired, the symptoms may not appear right away. But if you’re getting sick more often or taking longer to recover, it could be a sign your immune system needs attention.

Why Early Diagnosis Matters

Immunodeficiency often hides behind recurring sinus infections, pneumonia, or gut issues that just won’t go away. If left untreated, it can lead to long-term complications. 


Getting an early immunodeficiency diagnosis can:

  • Prevent repeat infections
  • Reduce hospital visits
  • Improve your quality of life
  • Help you and your family better understand how to stay well

Common Symptoms of Immunodeficiency

If your immune system isn’t functioning properly, your body sends out warning signs. Here’s what to watch out for:



  • Recurrent ear, sinus, or lung infections
  • Infections that don’t fully clear after one round of antibiotics 
  • Slow or poor wound healing
  • Chronic diarrhea or digestive problems
  • Persistent fatigue or general weakness

What Causes Immunodeficiency?

Several factors can lead to a weakened immune system. These include:



  • Genetic conditions (common in primary immunodeficiency)
  • Certain cancers
  • Chemotherapy or radiation treatments
  • Autoimmune diseases
  • Malnutrition or the natural aging process


Understanding the root cause is the first step toward finding the right solution, and we’re here to help you get there. 

Advanced In-Office IVIG Therapy

For many patients with Primary Immunodeficiency (PI), Intravenous Immunoglobulin (IVIG) therapy is a life-changing treatment. We are proud to offer on-site IVIG infusions at our San Antonio clinic, providing a safer, more comfortable, and more convenient alternative to hospital infusion centers.

Why Choose Us for Your IVIG Treatments?

Expert Supervision


Your infusions are administered and monitored by our specialized clinical team under the direct oversight of our board-certified allergists.

The Comfort of Home:


Relax in our private infusion suite equipped with comfortable seating, high-speed Wi-Fi, and a quiet environment.

Comprehensive Coordination


Our staff handles the complexities of specialty pharmacy coordination and insurance authorizations, ensuring your treatment is seamless.

Antibody Replacement:


IVIG therapy provides the essential antibodies your body cannot produce, significantly reducing the frequency and severity of infections.

Discover Who We Are


Apex Allergy & Asthma is a locally owned practice focused on personalized care for allergies, asthma, and immune conditions. We combine expert diagnosis with advanced treatments, including the latest addition of IVIG Infusion Therapy, to help patients find lasting relief and breathe easier.

Immunodeficiency & IVIG Therapy

Specialist IVIG therapy for diagnosed immune deficiencies.

Allergy Testing

Medically guided skin & blood tests to identify allergy triggers.

Immunotherapy (Allergy Shots)

Clinically supervised allergy shots to reduce long-term sensitivity.

How Immunodeficiency Is Diagnosed

Diagnosing immunodeficiency starts with understanding your medical history and the pattern of your symptoms. From there, specific lab tests help identify how well your immune system is functioning.


The diagnostic process may include:

Immunoglobulin Level Testing

Measures key antibodies to assess your immune system’s ability to fight infections.

Vaccine Response Evaluation

Checks how well your body builds protection after vaccinations.

White Blood Cell Analysis

Examines immune cell counts and types to spot irregularities.

Genetic Disorder Screening

Detects inherited conditions linked to primary immunodeficiency.

Your Partner in Building a Stronger Immune Defense

Effective care starts with the right approach. Our San Antonio immunodeficiency specialist will tailor your treatment plan to your unique needs, addressing your specific type of immunodeficiency and how it’s affecting your life. Treatment may include:

Immunoglobulin (Ig) Replacement Therapy

Provides the antibodies your body can’t make on its own, helping prevent serious infections. 

Antibiotic Prophylaxis

Prevents frequent or severe infections by stopping bacteria before they spread.

Vaccinations

Triggers immune protection against specific diseases your body may struggle to fight naturally. 

Nutritional Guidance

Supports immune function by identifying and correcting nutrient deficiencies.

Coordination with Specialists

Ensures you receive comprehensive care for related conditions, improving long-term health.

Reclaim Your Health and Quality of Life


If you think you or your child might have an immune system problem, don’t wait. The sooner we identify what’s going on, the sooner we begin the right immunodeficiency treatment. We’re here to help you regain control of your health with answers and expert care. 

Talk to Our Experts

Frequently Asked Questions

  • Do I have to go to a hospital for IVIG therapy?

    No. At Apex Allergy and Asthma Care, we provide IVIG therapy right here in our office. This allows you to receive your treatment in a familiar, comfortable environment with doctors and nurses who already know your medical history.

  • How long does an IVIG infusion take?

    Infusion times vary with dosage and individual patient, typically ranging from 2 to 4 hours. Our suite is designed to make this time as productive or relaxing as you’d like. Feel free to bring a laptop to work on or a book to read.

  • I’ve had multiple infections, but my standard lab tests are normal. Could it still be immunodeficiency?

    It’s possible. Some immune deficiencies don’t show up on basic bloodwork. Advanced or functional immune testing may be needed to get a clear picture. 

  • Will I have to take medication for life if I’m diagnosed with immunodeficiency?

    While treatments make it possible to lead a near-normal life, most primary immunodeficiencies lack a cure and require ongoing care to prevent infections and protect organ function. Finding a cure for many immunodeficiencies remains the focus of ongoing research.

  • Can stress or poor sleep weaken my immune system enough to mimic immunodeficiency?

    Chronic stress and poor sleep can temporarily weaken immune function, but they don’t cause true immunodeficiency. If symptoms persist or infections are unusually frequent, it’s worth investigating further.