Field Extraction help!!

Hi , We have sample data like below and need to extract fields from below fields From data below We need to extract Fields **"GB*2" with field value as "NC-MEDICAL" and "GI*" as "NC-Medical"**** ******20150816*1603*34578*X*1879642~ST*270*000000001*1879642~BHT*0022*13*PHX*20150816*1603~LG*1**20*1~NM1********GB*2*NC-MEDICAL*******GI*NC-MEDICAL******* Can someone please help us with field extraction? Thanks Sarath