NLCSP Eligibility Checker
With the introduction of the National Lung Cancer Screening Program (NLCSP), General Practitioners play a pivotal role in identifying high-risk patients who benefit most from Low Dose Computed Tomography (LDCT) screening.
However, remembering the specific inclusion and exclusion eligibility criteria during a busy consult can be challenging, particularly when it involves calculating "pack-years" on the fly. To support your clinical workflow, we have developed an interactive NLCSP Eligibility Checker.
Why use the Lung Cancer Screening Eligibility Tool?
This lung cancer screening program eligibility tool is designed to help GPs verify if a patient potentially meets the strict legislative criteria for the NLCSP before initiating a referral. By automating the pack-year calculation and cross-referencing age and symptom status, this tool reduces administrative burden and ensures referrals are appropriate.
For a deeper dive into the program's background and evidence, read our detailed article here.
How to Calculate Pack Years and Verify Eligibility
The tool is broken down into four simple sections matching the NLCSP criteria:
- Patient Age: Enter the patient's current age. The program is strictly for patients aged 50 to 70 years.
- Symptom Check: Verify that the patient is asymptomatic. If the patient is coughing up blood or has unexplained weight loss, they require a diagnostic pathway, not a screening pathway.
- Smoking History: Select their current status. They must be a current smoker or have quit within the last 10 years.
- Pack-Year Calculator: You do not need to do the math manually. Simply enter the average cigarettes smoked per day and the number of years smoked. The tool will calculate the total pack-years.
- Requirement: At least 30 pack-years.
Once all fields are complete, the status banner at the bottom will display the patient's eligibility status to help guide your next steps.
Frequently Asked Questions
Why is the patient ineligible if they have symptoms?
The NLCSP is a screening program intended for asymptomatic individuals. If a patient presents with symptoms such as haemoptysis or a new persistent cough, they may require a diagnostic workup (such as a diagnostic CT chest and specialist referral) rather than screening.
My patient quit 11 years ago but was a heavy smoker. Are they eligible?
No. Under the current NLCSP criteria, patients must have quit within the last 10 years to be eligible. Evidence suggests that risk profiles may change over time after cessation. Clinical judgement and standard referral guidelines should be applied regarding the benefits vs. risks of screening.
How is a "Pack-Year" calculated exactly?
One pack-year is defined as smoking 20 cigarettes a day for one year.
Can I use this tool for patients over 70?
Currently, the program is capped at 70 years of age. For older patients, clinical judgement and standard referral guidelines should be applied regarding the benefits vs. risks of screening.
Summary
This tool simplifies the complex criteria of the NLCSP into a 30-second check, ensuring you can focus on the patient conversation rather than mental arithmetic. By ensuring patients meet the age, symptom, and smoking history requirements before referral, we can streamline the pathway to early detection of lung cancer and other potential incidental findings.
Read more about the National Lung Cancer Screening Program by clicking here.
Disclaimer
This tool is intended only for educational purposes. It is not intended to replace the clinical judgement of a health care professional to make a clinical diagnosis or treatment decision regarding an individual patient. Individual patient factors must always be considered before making prescribing decisions.

