Get tested for asthma in California
We believe that proper asthma care begins with an accurate diagnosis. Our asthma testing services in Fresno and Merced are designed to identify the root causes of your symptoms and determine the severity of your condition, so we can tailor a treatment plan that works for you. Whether you're experiencing shortness of breath, chronic cough, or suspect allergy-induced asthma, our advanced diagnostic evaluations will give you the clarity and control you need.
Why asthma testing matters
Asthma can mimic or overlap with other respiratory conditions like bronchitis, COPD, or allergies. Many patients remain undiagnosed or are misdiagnosed, leading to poor management and flare-ups. With the right testing, we can:
- Confirm whether your symptoms are caused by asthma
- Identify environmental or allergic triggers
- Determine the severity and type of asthma
- Track how well your lungs are functioning over time
- Create a customized asthma action plan for long-term control
What to expect during asthma testing in California
Pulmonary Function Tests (PFTs)
These are non-invasive breathing tests that measure how well your lungs work.
- Spirometry: Measures how much air you can breathe in and out, and how quickly
- Peak Flow Testing: Tracks how fast you can exhale, helping detect narrowing of the airways
- Methacholine Challenge Test (if needed): Helps confirm asthma if spirometry results are normal but symptoms persist
These tests are safe, quick, and provide valuable insights into your lung capacity and airflow limitations. 
Allergy Testing
Since asthma is often triggered by allergens, we may recommend:
- Skin Prick Testing: Tiny amounts of common allergens (like pollen, dust mites, mold, pet dander) are applied to your skin to observe reactions
- Blood Tests (IgE levels): Used to measure immune response to specific allergens, especially if skin testing isn’t suitable
Identifying your allergy triggers helps us recommend strategies to avoid flare-ups and explore options like allergy shots (immunotherapy) if needed. 
FeNO Testing (Exhaled Nitric Oxide)
This advanced test measures the level of nitric oxide in your breath, which can indicate airway inflammation which is a key marker of asthma. It’s especially helpful for:
- Diagnosing eosinophilic asthma
- Monitoring response to corticosteroids
- Adjusting treatment for better control
Physical Exam and Medical History Review
Our asthma specialist, Dr. Muhammad Hassan Bashir, will also perform a detailed clinical evaluation, including:
- Listening to your lungs
- Discussing your symptoms and frequency
- Reviewing your environmental exposures, family history, and lifestyle
- Identifying coexisting conditions like allergic rhinitis or eczema
This holistic approach ensures nothing is overlooked in your diagnosis.
Asthma testing for all ages
We provide pediatric asthma testing for young children and tailored testing for adults. Early detection is key, especially for children with a family history of asthma or allergies. If your child coughs often, wheezes, or struggles during physical activity, asthma testing can provide peace of mind and help prevent complications. 
Why Choose Sierra Allergy Asthma and Sinus Center?
Serving patients in Fresno and Merced, we are committed to:
- State-of-the-art testing equipment
- Same-day or next-day appointments
- Personalized, one-on-one care
- Expertise in both allergy and pulmonary care
- Culturally sensitive and compassionate environment
Our goal is not just to treat asthma but to empower you to breathe better, live better. 
Book your asthma evaluation today
If you're struggling with unexplained coughing, breathing difficulties, or allergy symptoms, don't wait. Early and accurate testing can transform your health journey. Schedule now FAQs
Frequently Asked Questions
What kinds of tests are used to confirm asthma?
At Sierra Allergy Asthma and Sinus Center, we use advanced diagnostic tools to confirm asthma. These include spirometry to measure lung function, peak flow monitoring, and sometimes methacholine challenge tests for more detailed evaluation. We also assess your symptoms, triggers, and medical history to ensure an accurate diagnosis and personalized treatment plan.
What is spirometry and how does it help in asthma testing?
Spirometry is a painless, non-invasive test that measures how much air you can exhale and how quickly. It helps us assess lung function and detect narrowing of the airways, a key indicator of asthma.
Are there allergy tests included in asthma evaluations?
Yes. Since many asthma cases are triggered by allergies, we often perform allergy testing (skin prick or blood tests) to identify environmental or seasonal allergens that could be worsening your symptoms.
Can children undergo asthma testing?
Absolutely. We offer age-appropriate lung function tests and evaluations for children, along with child-friendly techniques to make testing comfortable and accurate for our younger patients.
How long does asthma testing take?
The complete evaluation, including history, physical exam, and lung function testing, usually takes about 30 to 60 minutes. If allergy testing is included, it may take a little longer.
