CA125 is a clinical tumor marker test item, and the cost is usually determined by the level of the hospital. Generally, the cost of CA125 examination for tumor-related factor in Grade IIIA hospitals is about 150 RMB, which includes blood collection fee and outpatient registration fee.CA125 examination is seldom taken as a separate examination, and it is generally combined with tumor-related factor and other tumor markers to have certain reference significance for tumor problems, and at the same time, it should be combined with imaging manifestations, especially colorectal tumor or female adnexal or pelvic malignant masses, which have a certain reference significance for tumor. The sensitivity of CA125 to colorectal tumors or malignant masses in the uterine adnexa and pelvis of women is relatively high. Therefore, it is better to go to regular hospitals for detailed consultation and inquiry if you want to have CA125 test.