This document outlines the different levels of health care: primary, secondary, and tertiary. Primary care is the first level of contact and is provided at local health centers, sub-centers, and by village health workers. It focuses on basic care, education, and prevention. Secondary care is provided at community health centers and district hospitals, offering diagnostic, treatment, and specialist services. Tertiary care handles complex cases unable to be treated at lower levels through specialist hospitals, medical colleges, and super-specialty hospitals with advanced technology and facilities. Each level serves important referral functions in the overall healthcare system.