Test Code Procedure   IA-2 Antibodies - see 500255, ICA-512 Autoantibodies 500255 ICA-512 Autoantibodies 500283 IGF Binding Protein-1 (IGFBP-1) 500284 IGF Binding Protein-2 (IGFBP-2) 500281 IGF Binding Protein-3 (IGFBP-3) 500282 IGF-I 500228 IGF-II 300520 Indirect Antiplatelet Alloantibody Profile 500220 Insulin 500225 Insulin Antibodies 500226 Insulin, Free and Total 803660 Insulin-Like Growth Factor (IGF-1), Pediatric with Z Score   Insulin-like Growth Factor Binding Proteins - see 500283 - IGFBP-1, 500284 - IGFBP-2, 500281 - IGFBP-3   Insulin-like Growth Factors - see 500282 - IGF-I or 500228 - IGF-II 300921 Intrinsic Pathway Coagulation Factor Profile (Factor VIII Activity, Factor IX Activity, Factor XI Activity, Factor XII Activity) 502092 IPTH, Parathyroid Aspirate 500648 Iron   Islet Cell Antibodies - see 500255 - ICA-512 Autoantibodies or 500877, 500878, 500879 - Diabetes Test Groups 500878 Islet Cell Dysfunction Test Group I (Insulin, Proinsulin, Proinsulin:Insulin Ratio) 500879 Islet Cell Dysfunction Test Group II (Glucose, Insulin, Proinsulin, Proinsulin:Insulin Ratio)