AbstractHereditary Angioedema (HAE) is characterized by recurrent attacks of submucosal or subcutaneous edema and is caused by mutations in gene SERPING1. We identified a novel heterozygous small deletion in SERPING1 using targeted exome sequencing in an HAE patient from an Indian family. The mutation c.491_502delAGACCAACATGG,p. Glu164_ Met167del, in exon 3 of SERPING1 gene is reported in the proband and her father but was not found in proband’s unaffected sibling and control samples. The mutation was classified as ‘Likely Pathogenic’ according to ACMG guidelines for interpretation of sequence variants. To the best of our knowledge, this is the first documented report for SERPING1 mutation in HAE type1 patients from India.