Nearly a year passed between the announcement by the Centers for Medicare and Medicaid Services (CMS) that Medicare coverage would be available for low-dose computed tomography (LDCT) Lung Cancer Screening and issuance of the regulations that would allow claims to be submitted.  The patient eligibility requirements and the details for performing the exam were announced in February 2015 but it took the rest of the year before the billing and reimbursement particulars were known.  Finally, Medicare will pay for LDCT procedures performed on and after February 5, 2015 beginning in 2016. A 43-page decision memo from CMS defines in great detail the criteria that must be met by patients, physicians, and imaging centers in order for the scans to be eligible for reimbursement.  Here is a practical summary of the rules for performing and billing these screening services.