Why Laboratory Results Are Required Before Form I-693 Can Be Sealed

Form I-693 is a comprehensive medical document that incorporates the results of several required laboratory tests. The civil surgeon cannot complete and seal the form until all test results have been received and reviewed. This is not a procedural formality — the lab results are a substantive part of the form, and USCIS requires that they be documented accurately.

Required laboratory tests for most immigration medical examinations include the TB/IGRA blood test (QuantiFERON-TB Gold or T-SPOT), syphilis serology (RPR or VDRL), and gonorrhea testing. For applicants over certain age thresholds, additional tests may be required. Most of these results are returned by the laboratory within one business day of the sample being collected.

However, not all laboratory results come back that quickly. Certain tests — particularly those triggered by an abnormal or reactive initial result — require additional processing time. When this happens, the civil surgeon must wait for the additional results before the form can be finalized.

Tests That Can Take Longer: TB Cultures and Confirmatory Tests

The most common cause of laboratory-related delays in Form I-693 processing is a reactive or indeterminate result on the initial TB screening test. If the IGRA blood test returns a reactive or indeterminate result, additional evaluation is required. In some cases, this may include a chest X-ray (which we perform in-house) and clinical evaluation by the civil surgeon. In other cases, a sputum culture may be ordered to rule out active tuberculosis.

TB cultures are among the slowest laboratory tests in the immigration medical context. A standard TB culture can take anywhere from 2 to 8 weeks to return a final result, depending on whether mycobacteria are detected and how quickly they grow. This is a significant delay that can substantially affect your Form I-693 processing timeline.

Similarly, a reactive syphilis screening result (RPR or VDRL) requires a confirmatory treponemal test. While confirmatory syphilis tests are typically faster than TB cultures, they still add time to the process. The civil surgeon must review all confirmatory results before completing the form.

How the Civil Surgeon Handles Delayed Results

When a laboratory result is delayed, the civil surgeon will not complete and seal Form I-693 with incomplete information. Doing so would violate USCIS Technical Instructions and could result in a Request for Evidence or rejection of your application. Instead, the civil surgeon waits for all results to be received before finalizing the form.

Our office will contact you if a laboratory result is delayed and explain the reason for the delay and the expected timeline for receiving the outstanding result. We understand that delays can be stressful, especially when you have a filing deadline or USCIS interview approaching, and we will keep you informed throughout the process.

What to Do If You Have a Filing Deadline

If you have an upcoming I-485 filing deadline, USCIS interview, or RFE response deadline and your Form I-693 is delayed due to laboratory results, contact our office immediately. Do not wait to see if the results come in on their own — proactive communication gives us the best chance of helping you.

Depending on the nature of the delay and your specific deadline, there may be options available. Your immigration attorney may be able to request a USCIS interview postponement, file your I-485 without the Form I-693 and submit it later in response to an RFE, or take other steps to protect your case while the results are pending. Consult with your attorney as soon as you become aware of the delay.

• Contact our office immediately when you learn of a lab delay
• Notify your immigration attorney of the delay and your deadline
• Ask your attorney whether your I-485 can be filed without Form I-693 and submitted later
• Ask whether your USCIS interview can be rescheduled if needed
• Ask our office about the expected timeline for the outstanding result
• Do not attempt to submit an incomplete or unsealed Form I-693 to USCIS

Expedited Lab Options

For standard laboratory tests — such as the IGRA blood test, syphilis serology, and gonorrhea test — our laboratory partner processes results on a routine basis, typically within one business day. There is generally no need for expedited lab processing for these standard tests.

For tests that require additional time due to reactive or indeterminate results, the timeline is largely determined by the biology of the test itself. TB cultures, for example, cannot be meaningfully expedited because the growth of mycobacteria takes the time it takes. However, our office will work with the laboratory to ensure results are processed as quickly as possible and will follow up proactively if results are not received within the expected window.

Communicating With Your Attorney About Lab Delays

If you are working with an immigration attorney, keep them informed of any laboratory delays affecting your Form I-693. Your attorney needs to know about delays as early as possible so they can adjust your case strategy accordingly. A delay that is communicated early gives your attorney time to explore options; a delay communicated at the last minute may leave few alternatives.

Your attorney may also be able to contact our office directly to discuss the status of your laboratory results and the expected completion date for your Form I-693. We welcome communication from immigration attorneys on behalf of their clients and will provide as much information as we can to help manage your case timeline effectively.