Numerous genes have been found to be associated with MODY—including HNF1A, HNF1B, HNF4A, GCK, NEUROD1, KLF11, PDX1, PAX4, BLK, CEL, INS, ABCC8, KCNJ11, and APPL1 [12]. The gene discussed is HNF1A; the disease is MODY.