As has been previously reported, the locus diversity of MODY in India is unlike that in European populations where up to 80% of patients carry variants in HNF1A and GCK. We found HNF1A variants in ~ 7% of the patients and GCK alterations in < 1% of the patient samples, a substantially lower rate than in Europeans and consistent with previous reports of Indian MODY patients [11, 12, 14, 37–39]. This evidence concerns the gene GCK and MODY.