ISO 15189 internal auditor training helps medical laboratory professionals develop the knowledge and practical skills needed to assess quality management and technical processes. The training generally covers ISO 15189 requirements, audit planning, risk-based auditing, objective evidence, process evaluation, interviewing techniques, nonconformity identification, corrective actions, and audit reporting. It can benefit laboratory managers, quality professionals, technical staff, internal auditors, consultants, and employees involved in laboratory quality and compliance. Practical exercises and case studies can strengthen participants’ ability to identify process gaps and evaluate the effectiveness of laboratory controls. Completing the training can support accreditation readiness, improve process consistency, strengthen quality practices, and contribute to continual improvement in medical laboratory operations.