Primary health centers (PHCs) in India are basic health units that provide integrated curative and preventive healthcare to rural populations. PHCs aim to provide essential primary care services, including medical care, maternal and child health services, immunizations, treatment for endemic diseases, and health education. They operate according to the Indian Public Health Standards, which define standards for infrastructure, services, and staffing at PHCs. A PHC typically serves a population of 30,000 in plains or 20,000 in hilly/tribal areas, and provides outpatient and inpatient care, emergency services, and basic diagnostic testing.