Introduction: The youth health survey shows that psychological problem are more prevalent in girls as compare to boys, higher number of girls is affected with common Psychological problems like anxiety, sleeping disorders, depression and eating disorders for the past decades, the studies have shown that most common psychological disorders among adolescent girls is Anorexia nervosa Objectives: To assess the pretest and posttest level of anorexia nervosa and health status among adolescent girls. To evaluate the effectiveness of planned nursing intervention on level of anorexia nervosa and its impact on health status among adolescent girls. To determine the correlation between the level of anorexia nervosa and health status among adolescent girls. Materials and Methods: A Quantitative approach and Quasi Experimental with time series design was adopted for the study. The Independent variable was planned nursing intervention and Dependent variables were Anorexia nervosa and health status. The study was conducted in 3 schools. The sample size was estimated by power analysis and considering the attrition of 10 % 120 samples were selected. Adolescent girls were screened using Eating attitude test (EAT- 26) scale for the level of Anorexia, self-reported semi structured questionnaire was used for Demographic variables, and observational health assessment checklist used to assess the health status. The Pilot study revealed that the tool was reliable and the study was feasible. Planned nursing intervention included planned teaching programme and nutritional ball. The investigator adhered to the ethical principles of human rights, beneficence and non-malfeasance, dignity, confidentiality and justice in all the aspects. SPSS statistical package was utilized for the data analysis.