When Is a Lung CT Covered?

Who typically qualifies for covered lung CT screening

The USPSTF recommends lung cancer screening with low-dose CT for adults ages 50 to 80 who have smoked at least 20 pack-years and currently smoke or quit within the past 15 years. A pack-year is calculated by multiplying the number of packs smoked per day by the number of years smoked. Someone who smoked one pack per day for 20 years has 20 pack-years, as does someone who smoked two packs per day for 10 years.

Eligibility is based on cumulative exposure, not on whether you feel fine today. Even former smokers can qualify if they quit recently enough. The goal is to find early disease in people at high enough risk to benefit from screening.

• Age 50 to 80
• At least 20 pack-years of smoking
• Current smoker or quit within the past 15 years
• Asymptomatic and eligible for curative treatment

Coverage requirements that still apply

Meeting clinical criteria is not enough to determine coverage. Medicare currently covers eligible asymptomatic adults ages 50 to 77 once per year, requires an order, and requires a discussion of benefits and risks before the first screening. The Medicare beneficiary pays nothing when the provider accepts assignment.

Private-plan age limits, network rules, ordering requirements, and cost sharing can differ. Verify the exact benefit instead of assuming the USPSTF age range is identical to your plan's coverage rule.

If you quit smoking more than 15 years ago, are younger than 50, or have a limited smoking history, routine lung CT screening is usually not covered. Some plans may also stop covering screening if you develop a health condition that makes curative treatment unlikely.

What this does not mean

A covered lung CT is not a general health scan for smokers. It screens only for lung cancer in a narrowly defined high-risk group and does not evaluate emphysema, heart disease, or other smoking-related damage. It also does not replace quitting smoking, which remains the single most important step you can take for your health.

What to ask your insurer and clinician

Ask whether the ordering visit must be documented as shared decision-making, whether the imaging center is in network, and what happens if the scan finds a nodule requiring follow-up. Ask for the exact out-of-pocket estimate before scheduling.

Also ask how long you remain eligible. If you quit smoking during screening, you can usually continue annual scans until you reach 15 years since quitting or age 80, whichever comes first.

Sources checked July 20, 2026. Independent clinician review is pending.