Guidelines › Encounters for chemotherapy, immunotherapy and radiation therapy
Encounters for chemotherapy, immunotherapy and radiation therapy
Official text from the FY2027 ICD-10-CM Official Guidelines for Coding and Reporting. The wording is quoted exactly.
Guidelines I.C.2.e.2
“assign code Z51.0, Encounter for antineoplastic radiation therapy, or Z51.11, Encounter for antineoplastic chemotherapy, or Z51.12, Encounter for antineoplastic immunotherapy as the first-listed or principal diagnosis.”
“The malignancy for which the therapy is being administered should be assigned as a secondary diagnosis.”
“If a patient admission/encounter is for the insertion or implantation of radioactive elements (e.g., brachytherapy) the appropriate code for the malignancy is sequenced as the principal or first-listed diagnosis. Code Z51.0 should not be assigned.”