Fasting Is Not Required for Standard Immigration Lab Tests

The standard laboratory panel for the immigration medical examination — including syphilis serology (RPR), gonorrhea testing (NAAT), and the IGRA TB blood test (QuantiFERON-TB Gold) — does not require fasting. You may eat and drink normally on the day of your appointment.

There is no need to skip meals, restrict fluids, or avoid coffee before your visit. Arriving well-fed and hydrated is actually encouraged, as it can make the blood draw process easier and more comfortable.

Why These Tests Don't Require Fasting

The three core immigration lab tests measure specific markers that are not affected by food or beverage intake. The RPR test detects syphilis antibodies in the blood, the NAAT test identifies gonorrhea bacterial DNA, and the QuantiFERON-TB Gold measures immune response to TB antigens. None of these markers are influenced by whether you have eaten recently.

This is different from metabolic tests such as fasting blood glucose or lipid panels, which require fasting because food intake directly affects the values being measured.

When Fasting May Be Required

In some cases, the civil surgeon may order additional laboratory tests based on your medical history, physical examination findings, or country of origin. Certain additional tests — such as fasting blood glucose or lipid panels — may require fasting.

If this applies to your situation, our staff will advise you in advance of your appointment so you can prepare appropriately. This is not common for standard immigration exams, but it does occur in specific clinical situations.

How to Prepare for Your Lab Tests

While fasting is not required, there are several things you can do to prepare for a smooth appointment:

• Eat a normal meal before your appointment — do not skip breakfast
• Drink plenty of water — staying hydrated makes blood draws easier
• Bring your vaccination records and any prior medical documentation
• Bring a government-issued photo ID
• Arrive 10–15 minutes early to complete intake paperwork
• Inform our staff of any medications you are currently taking

What to Expect During the Blood Draw

The blood draw for immigration lab tests is a routine procedure performed by trained clinical staff. A small amount of blood is drawn from a vein in your arm using a standard needle. The process takes only a few minutes.

If you have a history of fainting or anxiety related to blood draws, please inform our staff when you arrive. We can take steps to make the experience more comfortable, such as having you lie down during the draw.