Blog Post

Finding out you tested positive for tuberculosis (TB) during your Form I-693 (Report of Immigration Medical Examination and Vaccination Record) exam can be incredibly alarming. Your mind might immediately jump to the worst-case scenarios: Is my green card application denied? Am I going to be deported? Am I severely ill?

Take a deep breath. A positive TB test does not mean your green card is denied.

In fact, it is one of the most common speed bumps in the immigration medical process. Tens of thousands of applicants successfully navigate this hurdle every year.

Here is a clear, step-by-step breakdown of exactly what a positive test means and how to handle your next steps without derailing your U.S. permanent residency.

First, it is vital to understand how USCIS screens for tuberculosis. Civil surgeons use an IGRA (Interferon-Gamma Release Assay) blood test, such as QuantiFERON-TB Gold or T-SPOT.

If your blood test comes back positive, it simply means your immune system has encountered the TB bacteria at some point in your life. It does not automatically mean you are contagious or sick. The medical community divides TB into two distinct categories:

Latent TB Infection (LTBI)
• The Reality: The bacteria are asleep in your body. Your immune system is successfully fighting them off.
• Symptoms: You have absolutely no symptoms and feel perfectly healthy.
• Contagiousness: You cannot spread the bacteria to anyone else.
• Immigration Status: This is not an inadmissible health condition. You can still get your green card.

Active TB Disease
• The Reality: The bacteria are active, multiplying, and overriding your immune system.
• Symptoms: You may experience a persistent cough, chest pain, fever, night sweats, or unexplained weight loss.
• Contagiousness: You can spread the bacteria to others through the air.
• Immigration Status: This is considered a Class A inadmissible health condition. You must complete treatment before your green card can be approved.

If your IGRA blood test returns a positive result, USCIS guidelines require the civil surgeon to follow a strict diagnostic protocol before they can sign off on your Form I-693.

Step 1: The Chest X-Ray
The civil surgeon will immediately refer you for a chest X-ray. This imaging looks closely at your lungs to see if there are any active signs of infection, such as scarring or cavities caused by the bacteria.
• If the X-ray is normal: You have Latent TB. The civil surgeon can fill out, sign, and seal your Form I-693. They will check a box noting that you have Latent TB but are cleared for immigration purposes.
• If the X-ray is abnormal: You will be flagged for suspected Active TB, and further testing is required.

Step 2: Sputum Testing (Only if X-Ray is Abnormal)
If your X-ray shows signs of active disease, you will be referred to a local public health department or laboratory for sputum cultures. You will provide deep cough samples over three consecutive days.
• These samples are tested in a lab to see if live TB bacteria grow.
• Because TB bacteria grow very slowly, these cultures can take up to 6 to 8 weeks to yield final results.

Step 3: Treatment and Clearance
• For Latent TB (Normal X-Ray): While you are legally cleared to receive your green card, the civil surgeon will strongly recommend a course of preventative antibiotics (usually lasting 3 to 9 months) to ensure the bacteria never wake up. You can complete this treatment after you submit your paperwork.
• For Active TB (Abnormal X-Ray/Positive Culture): You must complete a strict, directly observed therapy (DOT) antibiotic regimen managed by your local health department. Once the health department certifies you are cured and no longer infectious, the civil surgeon can sign your Form I-693, and your immigration process can resume.

A positive TB test will inevitably add time to your medical clearance process.

• The Best Case (Latent TB): Expect a delay of 3 to 7 business days to schedule, take, and receive the results of your chest X-ray. Once the clear X-ray is delivered to your civil surgeon, they can hand over your sealed envelope.

• The Worst Case (Suspected Active TB): Expect a delay of 2 to 3 months just for laboratory culture processing, and an additional 6 to 9 months if full treatment is required.

• Do Not Panic: A positive IGRA test is incredibly common, especially for applicants who grew up in countries outside the U.S. or who received the BCG vaccine as a child. (Note: The IGRA blood test is highly accurate and is not triggered by the BCG vaccine, meaning a positive result indicates true exposure).

• Track Your RFE Deadlines: If you are completing this medical exam in response to a time-sensitive Request for Evidence (RFE) and you are flagged for active TB testing, have your attorney request an extension from USCIS immediately based on mandatory medical timelines.