Introduction: Congenital Heart Disease is the most common congenital abnormality in newborns and has been recognized as one of the leading causes of death in the first year of life. The global incidence of CHD is estimated at 8 per 1000 live births. Using pulse oximetry critical and many of the asymptomatic CHD can be identified in the immediate post natal period. This strategy will help in early identification and its intervention. Objective: To assess the effectiveness of pulse oximetry as a screening tool for detection of CHD in asymptomatic newborn. Methods: It was a Hospital based Cross sectional study conducted in the Department of Obstetrics and Gynaecology, in collaboration with the Department of Paediatrics, of a tertiary hospital in North Eastern State from May 2022 to April 2024. Results: The mean birth weights of the neonates were2.93±0.29 Kg and the mean gestational age was 37.74±1.56 weeks. 4% of all neonates screened with pulse oximetry showed positive result. Among them 4 (2%) neonate were diagnosed with CHD. Out of the 4 neonates diagnosed with CHD, 3 were diagnosed with VSD and 1 with PDA. Conclusion: Eight (8) i.e 4% of the neonates were screened with positive pulse oximetry and out of which four (4) were diagnosed with CHD. Proportion of neonates who were screened positive in pulse oximetry with positive echocardiographic findings were significantly higher than those who screened negative (p value <0.001). Therefore, the pulse oximetry screening for detection of CHD among asymptomatic neonates in our study showed a moderate sensitivity (75%), high specificity (97.4%) and negative predictive value (99.47%) and a reasonably low positive predictive value (37.5%), respectively