Dr. Khalid Hussain is an internationally recognized researcher in pediatric endocrinology and metabolic genetics, with a sustained focus on the molecular mechanisms of hypoglycemia, congenital hyperinsulinism, monogenic diabetes, and childhood obesity. His research integrates clinical phenotyping with advanced genomic, functional, and translational approaches to elucidate genotype–phenotype relationships in rare endocrine and metabolic disorders. He has led and contributed to numerous large-scale, competitively funded national and international research projects, advancing precision diagnostics and targeted therapies in pediatric metabolic disease. Professor Hussain has authored an extensive body of peer-reviewed literature, comprising 324 scientific documents that collectively have received 11,625 citations, reflecting the global impact of his work. With an h-index of 55, his scholarship has significantly shaped contemporary understanding of dysregulated insulin secretion, pancreatic development, and inherited endocrine disorders, and continues to influence clinical practice and future research directions worldwide.