In the present study conducted on 50 icteric and 50 non-icteric neonates with G6PD deficiency, 38 subjects (76%) were male and 12 (24%) were female in the former, and 45 (70%) were male and 15 (30%) were female in the latter group. The mean weight of icteric and non-icteric neonates was 3.2 ± 0.4 kg and 2.8 ± 0.8 respectively. Non-icteric neonates were in the age range of 1 to 15 days with the mean of 6.8 ± 4.5 days. Eleven patients (22%) in the icteric group had a positive family history. The mean hemoglobin level was 16.1 ± 2.3 mg/dl in icteric group. The age of onset of icter was 2.7 ± 1.2 days, ranging from 6 to 8 days, and the mean bilirubin level was 18.3 ± 2.8 mg/dl in this group. The type of treatment used for icteric patients was phototherapy in 30 neonates (68%) and exchange transfusions in 16 cases (72%). The mean hospital stay was 4.4 ± 1.2 days, ranging from 2 to 8 days. Mediterranean mutation was the most frequent mutation observed in icteric and non-icteric groups, while Cosenza mutation was found in none of the samples; the distribution of rare mutations of G6PD gene was significantly higher in non-icteric compared to icteric neonates with G6PD deficiency (Table 1).