Final answer:
The required code for a blood collection requisition form is called the ICD-10 code.
Step-by-step explanation:
The code that is required for a blood collection requisition form is called the ICD-10 code. The ICD-10 code is an internationally recognized code used by medical professionals to classify and code diseases, injuries, and other health conditions. It provides a standardized way of documenting and communicating medical information.