✔ Backed by: Centers for Disease Control and Prevention (CDC) · U.S. Preventive Services Task Force (USPSTF) · Medicare.gov. Each fact links to its source, and the full list is at the bottom of this post.
More people in the United States die from lung cancer than from any other type of cancer [1]. Part of the reason is timing. Most people with lung cancer have no symptoms until the disease is advanced [1]. That is where lung cancer screening comes in. For some adults, a yearly scan can help find lung cancer early, before it causes problems.
Yet only about 18% of eligible adults in the U.S. have been screened [3]. Many people who qualify have never had a clinician bring it up. Some feel embarrassed to talk about smoking. Others think, “I quit years ago, so it does not apply to me.” This guide can help you figure out whether to bring it up, and how to start that talk without shame.
Who lung cancer screening is recommended for
The U.S. Preventive Services Task Force recommends a yearly low-dose CT scan for adults who meet all three of these conditions [2]:
- Are 50 to 80 years old, and
- Have a smoking history of at least 20 “pack-years,” and
- Smoke now or quit within the past 15 years
This recommendation came out in 2021. It replaced an older version that used ages 55 to 80 and a 30 pack-year history [2]. So if a doctor told you years ago that you did not qualify, the answer may be different now.
What a “pack-year” means
A pack-year is smoking an average of one pack of cigarettes a day for one year. One pack a day for 20 years equals 20 pack-years. So does two packs a day for 10 years [3].
For example, imagine someone who smoked about half a pack a day for 40 years. Half a pack times 40 years is also 20 pack-years. How fast the numbers add up surprises many people. If you are not sure of your number, a rough estimate is a fine place to start with your clinician. You can say: “I smoked about a pack a day from my twenties until I quit at 58. Does screening make sense for me?”
What the scan is like
The test’s name is a low-dose CT scan, or LDCT. You lie on a table while an X-ray machine uses a small amount of radiation to make detailed pictures of your lungs. The scan takes only a few minutes and does not hurt [3].
Screening is meant to be yearly, not one and done. CDC says yearly screening should stop when a person turns 81, has not smoked in 15 or more years, or develops a health problem that makes them unwilling or unable to have surgery if cancer is found [3].
Know the benefits and the downsides
Screening is for people with no symptoms. If you have symptoms that worry you, such as a cough that will not go away, talk with your clinician about them directly rather than waiting for a screening scan.
Screening also has real risks, and it is fair to weigh them. CDC lists three. The first is a false alarm. A scan can suggest cancer when none is there, which can lead to more tests and even surgery that was not needed. The second is overdiagnosis. A scan can find a cancer that may never have caused a problem, which can lead to treatment that was not needed. The third is radiation. Radiation from repeated scans can cause cancer in otherwise healthy people [3].
That is why the conversation with your clinician matters so much. Your health, your history, and your wishes all count. There is no wrong answer, only the one that fits you.
What Medicare covers
Medicare Part B covers a low-dose CT scan once a year for people who are 50 to 77, have no signs or symptoms of lung cancer, have at least a 20 pack-year history, smoke now or quit within the last 15 years, and have an order from a provider [4]. Notice that Medicare’s age range stops at 77, which is lower than the Task Force’s 80.
Before your first scan, you need a visit with your provider to talk through the benefits and risks and decide if screening is right for you. You pay nothing for the scan if your provider accepts assignment. Other costs can vary depending on your other insurance and where you get the test [4]. If you have Medicare Advantage, Medicaid, or other insurance, call the number on your card and ask how they cover it.
Tru-Tips: When you schedule the scan, ask the office how you will get the results and who will call you if something needs a follow-up. Put a reminder in your calendar for the same month next year so the yearly scan does not slip.
Lung cancer screening questions to ask at your visit
Bringing a few questions can make the visit feel less rushed:
- “Based on my smoking history, does screening fit me?”
- “What happens if the scan shows something?”
- “Where would I go for the scan, and will it be covered?”
- “How will I be reminded about next year’s scan?”
Help to quit is free
Screening works best alongside quitting, but you do not have to quit to ask about it. If you smoke and want help, you can get free, confidential coaching from a quitline at 1-800-QUIT-NOW (1-800-784-8669) [5]. Smokefree.gov has free tools, a free texting program, and the quitSTART app [5]. There are also medicines that can help. Ask your clinician or pharmacist which choice fits you. Many quit treatments may be free or covered by insurance [5].
Let’s talk about it
Has a clinician ever brought up lung cancer screening with you? If not, what would make it easier to ask? Share your thoughts in the comments.
One Tru Step: Do a quick pack-year estimate tonight and write it down. Bring that number to your next checkup and ask, “Does lung cancer screening fit me?”
Sources and further reading
- CDC: Lung Cancer Awareness
- USPSTF: Lung Cancer Screening Recommendation (2021)
- CDC: Screening for Lung Cancer
- Medicare.gov: Lung Cancer Screenings
- CDC: How to Quit Smoking
Sources checked October 15, 2026. General education; individual care and coverage questions require an appropriate professional.
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