This document provides an overview of outpatient departments (OPDs) in hospitals. It defines an OPD as the section of a hospital that provides care for non-inpatient patients, including specialist consultations, treatment, screening for hospitalization, and follow-up care. OPDs can be centralized, with consultants from different departments in one area, or decentralized across departmental areas. Key functions of OPDs include treatment, medical records, and providing primary healthcare services. The document outlines recommendations for OPD location, layout, size, organizational structure, equipment needs, and staffing. It also describes the general patient flow process through an OPD.