Genomic source class means category of source of tissue sample used to determine the sequence. Here is the loinc answer List for Allelic state:1. Germline LA6683-2; 2. Somatic LA6684-0; 3. Prenatal LA6685-7; 4. Likely Germline LA18194-3; 5. Likely Somatic LA18195-0; 6. Likely Prenatal LA18196-8; 7. Unknown Genomic Origin LA18197-6.