Number of Prior Chemotherapies

**Semantic type:** Clinical Attribute

**Definition:** Number of prior chemotherapy regimens: If a patient has received a chemotherapy regimen, provide the number of different single or multi agent chemotherapy regimens the patient has received. A regimen is described as a distinctive collection of agent(s) and/or modalities to be utilized together during a cycle or course of therapy. A chemotherapy regimen may have been discontinued for any reason (e.g. completion of therapy, toxicity, disease progression). If the planned treatment is ABVD/MOPP code as one chemotherapy regimen.

**Synonyms:** - Multiple Agents Therapy