Diagram of patient-reported and PMP-recorded opioid prescriptions. The percentages refer to the proportion of that subsample (N ) responding as specified. “Patient-reported” refers to patients’ queried responses at the time of NMMCP enrollment renewal; “PMP” refers to categorizations based on evidence in the PMP records. Patients were asked about preenrollment use. PMP records covering the six month period prior to enrollment were used to measure preenrollment PMP activity; PMP records for months 12 and 13 were used to evaluate elimination. Red-colored patient rates indicate misreporting; red outlines indicate repeated misreporting.