Prior antivenin use is a contraindication of future antivenin use.

What is preexisting ventilation?

A. Actual and potential ventilation of a structure B. Ventilation made possible by windows and doors C. Possible ventilation once fire passes incipient stage D. Ventilation made possible by cutting holes in a structure

A medical biller may assign ICD-9, ICD-10, or CPT codes to patient visits

Indicate whether the statement is true or false