Clinically-Ready Label-Flip Detection for Medical AI

Abstract

Medical AI pipelines face integrity risks from label flipping—mislabeling that harms thresholds, calibration, and parity. Because anomalies are rare, evolving, and often mislabeled, a purely supervised detector tends to miss new problems and flood reviewers with false alarms; a triage loop—rank strong model-vs-label disagreements, review a small top slice, fix, retrain—keeps effort low and results trustworthy. We present a lightweight procedure: basic plausibility/duplicate checks; leakage-safe K-fold cross-fitting; calibration; and Confident Learning to derive per-example flip scores (and the confident joint). High-scoring cases receive budgeted chart-review; we then selectively relabel or reweight, retrain, and recalibrate. We evaluate flip-ranking (PR-AUC, precision@k, TPR@low-FPR) and downstream AUROC/PR-AUC, ECE/Brier, and parity deltas. A HiRID ICU case demonstrates integrity and calibration gains with limited review effort.

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