ICD-10-CM codes in the Z category are used to indicate the patient’s personal or family history of certain conditions, including neoplasms. There are two types of Z codes that can be used to indicate a patient’s history of neoplasms:
- Personal history of malignant neoplasm (Z85): These codes are used to indicate a patient’s history of a previous malignant neoplasm, such as breast cancer or melanoma. These codes are used when the cancer has been previously treated, and there is currently no evidence of the active disease.
- Family history of malignant neoplasm (Z80): These codes are used to indicate a patient’s family history of a malignant neoplasm, such as breast cancer or colon cancer. These codes are used when the patient has a first-degree relative (parent, sibling, or child) who has been diagnosed with a malignant neoplasm, but the patient has not been diagnosed with the disease.
It is important to note that Z codes are not used to indicate the current or active neoplasm, but rather to indicate the patient’s personal or family history of the disease. Therefore, codes from other chapters of ICD-10-CM, such as chapter 2 (Neoplasms), are used to indicate the current or active neoplasm.