Abnormal tumor markers (R97)

ICD-10 code R97 and its subcodes classify various abnormal tumor marker test results when a definitive diagnosis is not yet established. These codes are used primarily to document elevated levels of specific tumor markers detected through laboratory tests.

This range includes codes for elevated carcinoembryonic antigen levels, such as R97.0; also known as high carcinoembryonic antigen or CEA; which can indicate various cancers or benign conditions. R97.1 refers to elevated cancer antigen 125 (CA 125), a marker often used in monitoring ovarian cancer. The R97.2 series covers elevated prostate specific antigen (PSA) levels, including R97.20 for PSA outside the normal range and R97.21 for rising PSA after prostate cancer treatment. Other tumor markers that do not fit these categories fall under R97.8, which includes markers like cancer antigen 19-9, ovarian or endometrial cancer susceptibility markers, and high tumor mutational burden. These codes help healthcare providers track abnormal tumor marker findings separate from confirmed diagnoses, supporting further diagnostic evaluation and monitoring.