What's this test for?

This test is ideal if you're experiencing ongoing respiratory symptoms like coughing, wheezing, or shortness of breath that don't seem to go away, especially if you've been exposed to mold or damp environments. It helps if you have a history of asthma or lung issues that seem to flare up unexpectedly, since it checks for an immune response to a common mold called Aspergillus fumigatus. It's also useful for people who suspect a mold allergy or sensitivity might be behind their chronic symptoms.

What's included in this test?

This test measures a specific type of antibody your immune system makes when it reacts to Aspergillus fumigatus, a mold found in soil, dust, and damp indoor spaces. This particular antibody type is helpful for spotting ongoing or chronic immune reactions to mold exposure, which can be linked to breathing problems and allergic conditions. Understanding this single marker gives insight into whether mold sensitivity could be a factor in your symptoms.

What happens after I get my results?

Your results will show up in your account along with the normal range so you can see exactly where your value falls. If your level comes back elevated, simple next steps include reducing mold exposure at home, improving ventilation, and considering a retest after making those changes to see if your levels drop. You can download the full lab report from your account at any time, and the trends feature lets you track this biomarker over time if you test again in the future. If your result is significantly high and you're having serious breathing trouble, seek medical care right away.

How can I naturally support my respiratory health if I have mold sensitivity?

Reducing mold exposure is the most effective natural step you can take, so fix leaks, use a dehumidifier, and keep indoor humidity below 50%. Adding air purifiers with HEPA filters can help remove mold spores from the air in your home. Eating anti-inflammatory foods like leafy greens, berries, and fatty fish may support your immune system, and staying hydrated helps keep your airways clear. Regular cleaning of bathrooms, basements, and other damp areas also lowers your ongoing exposure.

When will I get my results?

Results are typically ready within about 7 days of your lab visit. Once they're finalized, they'll be uploaded directly to your secure online account, and you'll be notified when they're available to view.

Who should consider this test?

This test is a good fit for people with unexplained chronic cough, wheezing, or asthma-like symptoms, especially if they live or work in older, damp, or previously flooded buildings. It's also worth considering if you've noticed your respiratory symptoms get worse indoors or after being in musty environments. People with a known mold allergy who want to monitor their immune response over time may also benefit.

What symptoms indicate I may need this test?

Common signs include a persistent cough, wheezing, chest tightness, or shortness of breath that doesn't improve with typical allergy treatments. Some people also notice their symptoms worsen in specific buildings or seasons, particularly in humid or damp conditions. Recurring sinus congestion or worsening asthma symptoms can also be a clue that mold sensitivity is playing a role.

What does a high Aspergillus fumigatus IgG4 result mean?

A high result means your immune system has been making a strong, ongoing response to this type of mold, suggesting repeated or chronic exposure. This doesn't necessarily mean you're currently sick, but it does suggest mold could be contributing to your respiratory symptoms. Taking steps to reduce mold exposure in your environment and retesting later can help you see if your levels come down.

What causes a high Aspergillus fumigatus IgG4 level?

The most common cause is repeated or prolonged exposure to mold, often from living or working in a building with water damage, poor ventilation, or high humidity. Some people are also more prone to developing this immune response due to underlying lung conditions like asthma or cystic fibrosis. Occupational exposure, such as working in agriculture, construction, or old buildings, can also increase your risk.

How often should I retest?

If your first result is elevated, retesting after making changes to reduce mold exposure (such as fixing leaks or improving ventilation) in about 3 to 6 months can help you track progress. If your levels are normal and you're not experiencing symptoms, there's usually no need for frequent retesting unless your environment changes or symptoms return.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

Aspergillus IgG4 Test - Mold Sensitivity Check

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]