CCR9, CER1, CSF2, IL13RA1, INSL5, MBL2, MMP9, MSR1, NTS, TNFRSF19, CXCL2, HTR3C, IL1A, and NR4A2 are the differentially expressed immune-related genes of CAD that we screened from online datasets. The gene discussed is CCR9; the disease is coronary artery disorder.