What You Can Bring Through Airport Security With Medical Devices

Medical devices have their own TSA rules separate from regular carry-on limits

Medical devices — insulin pumps, continuous glucose monitors, nebulizers, oxygen concentrators, dialysis equipment, and similar items — do not count against your carry-on bag limit and do not have to follow the standard liquid or gel restrictions. You can bring them through security in their normal operating condition, and you do not have to remove them or power them down unless a TSA officer asks you to.

The core rule is straightforward: if it is a device your doctor prescribed or you use to manage a medical condition, TSA treats it differently from consumer electronics. That said, you will need to tell the officer at the checkpoint that you have a medical device, and you may need to show documentation depending on what you are carrying.

The rules change slightly if you are traveling internationally, if your device contains batteries, or if you are bringing backup supplies. Understanding which category your device falls into before you get to the airport saves time and prevents confusion at the checkpoint.

Key Takeaways

• Medical devices do not count toward carry-on limits and can go through security in their normal operating state without being removed or powered down.
• Notify the TSA officer at the checkpoint that you have a medical device, and be ready to show a prescription or doctor's letter if asked.
• Backup batteries, spare supplies, and liquid medications related to your device follow different rules than the device itself and may need to be packed separately.
• If your device contains lithium batteries, inform the officer — some devices require special handling but are still permitted.
• International travel with medical devices requires checking with your destination country's rules in addition to TSA rules, since other nations have stricter limits.

Devices that stay with you and do not need to be screened separately

Devices that are actively attached to your body or that you need to operate during the flight — insulin pumps, continuous glucose monitors, pacemakers, cochlear implants, prosthetics with electronic components — can pass through the metal detector while you are wearing them. You do not have to remove them, and you do not have to explain them unless the metal detector alarms.

If the metal detector does alarm, tell the officer immediately that you have a medical device. The officer may ask you to point to it or may use a handheld metal detector wand to locate it. Some devices will trigger an alarm; this is normal and expected. The officer will not require you to remove it unless you consent, and they cannot force you to do so.

Portable oxygen concentrators, CPAP machines, and similar devices that you bring as carry-on luggage also do not require advance notice, but you should still mention them to the officer. These devices are permitted in both carry-on and checked baggage, though carrying them on board is usually safer because baggage handlers may damage them.

Backup batteries and spare supplies that have different rules

Spare batteries for your medical device — whether they are lithium-ion, lithium-metal, or another type — follow stricter rules than the device itself. Lithium batteries in quantities larger than what is installed in your device must be declared to the TSA officer and packed in your carry-on bag, not checked luggage. Most travelers can bring up to two spare lithium batteries per device type.

Backup insulin, injectable medications, and liquid or gel medications related to your device are not subject to the 3.4-ounce liquid limit. You can bring as much as you need for your trip. However, you must declare these items to the officer at the checkpoint, and they may be opened and tested. Packing them in a clear bag makes the screening process faster.

Syringes, lancets, test strips, and other non-liquid supplies do not have restrictions and can go in either carry-on or checked baggage. If you are flying internationally, pack these items in your carry-on because some countries do not allow them in checked bags, and you may not have access to your luggage between flights.

Documentation you may need to show at security

You are not required to carry documentation for most medical devices, but having it makes the checkpoint process smoother if an officer has questions. A letter from your doctor on letterhead stating that you have a medical condition and use a specific device is the most useful form of proof. The letter does not need to be recent, but it should be legible and should name the device by type.

For devices like insulin pumps or continuous glucose monitors, a prescription or a photo of your prescription label can also work. Some travelers photograph their device's manual or the product packaging, which shows the device name and model. None of these documents are legally required, but they can prevent delays if a TSA officer is unfamiliar with your device.

If you travel frequently with the same device, consider keeping a copy of your doctor's letter in your carry-on bag at all times. This is especially useful if you travel internationally, because some countries' customs or security officers may ask for proof that the device is for personal medical use and not for resale.

International travel with medical devices

TSA rules apply only to flights departing from or arriving in the United States. If you are traveling to another country, that country's aviation authority and customs agency have their own rules, which are often stricter than TSA rules. Some countries limit the quantity of certain medications, restrict specific device types, or require advance notice.

Before you travel, contact the airline you are flying and the customs or health authority of your destination country. Many countries have websites listing prohibited and restricted medical items. Your doctor's letter becomes more important for international travel — some countries will not allow a device to enter without written proof that it is for your personal medical use.

If your device contains batteries or is powered by electricity, check whether your destination has the same electrical standards as the United States. You may need a voltage converter or a plug adapter. Some countries also have rules about bringing used medical supplies (like syringes or lancets) into the country; pack these in a separate, clearly labeled bag.

What happens if TSA stops you at the checkpoint

If a TSA officer stops you because of a medical device, stay calm and explain what the device is and why you use it. Most officers are trained to recognize common devices like insulin pumps and continuous glucose monitors, but they may not be familiar with newer or less common equipment. A simple explanation — "This is my insulin pump; I wear it all the time" — is usually enough.

If the officer wants to examine your device more closely, you have the right to ask for a private screening. You can also ask for a TSA supervisor if you feel you are being treated unfairly. The officer cannot confiscate a medical device that is permitted under TSA rules, and they cannot force you to remove it from your body without your consent.

If you are denied passage through security because of a medical device, ask the officer to explain which rule prohibits it and request to speak to a supervisor. You can also file a complaint with TSA after your trip by visiting the TSA website or calling the TSA Contact Center. Keep records of the date, time, and officer's name if possible.

Devices with lithium batteries and special handling

Lithium batteries power many modern medical devices, and TSA has specific rules about them because lithium batteries can pose a fire risk in aircraft cargo holds. If your device contains a lithium battery and is installed in the device, you can bring it through security normally. The battery does not need special handling as long as it is part of the device.

Spare lithium batteries must be packed in your carry-on bag, not checked luggage. Each battery must be either in its original packaging or have the terminals taped to prevent short circuits. You can usually bring up to two spare batteries per device type, though some airlines have stricter limits. Check your airline's website before you travel.

If you have questions about whether your specific device's battery is permitted, contact TSA before your trip. You can reach TSA Cares — a service that helps travelers with disabilities, medical conditions, and other needs — by phone at 855-787-2227 or by email through the TSA website. They can tell you whether your device will be permitted and what documentation you should bring.

Frequently Asked Questions

Do I have to tell the TSA officer about my medical device?

Yes, you should notify the officer that you have a medical device before you go through the metal detector or body scanner. This prevents confusion if the device triggers an alarm and helps the officer understand what they are seeing on the scanner. A simple statement like "I have an insulin pump" is sufficient.

Can I wear my insulin pump or continuous glucose monitor through the metal detector?

Yes. Devices worn on your body can pass through the metal detector while you are wearing them. You do not have to remove them. If the metal detector alarms, tell the officer about the device, and they will use a handheld wand or conduct a pat-down to locate it.

What if I am traveling with someone else's medical device or supplies?

You can travel with someone else's medical device or medications if you have written documentation from their doctor stating that the items are for their personal medical use. The person traveling should carry their own documentation if possible, but a letter addressed to you explaining the situation can work in a pinch.

Can I bring my nebulizer or oxygen concentrator on the plane?

Yes, portable oxygen concentrators and nebulizers are permitted in carry-on baggage. Some airlines require advance notice, so call your airline before your trip. These devices are safer in carry-on than in checked baggage because baggage handlers may damage them, and you may need them during the flight.

What should I do if my medical device is confiscated at security?

Ask the officer to explain which TSA rule prohibits the device and request to speak to a supervisor. If the device is permitted under TSA rules, it should not be confiscated. If you believe you were treated unfairly, file a complaint with TSA through their website or by calling the TSA Contact Center, and keep records of the date, time, and officer involved.