Final answer:
ICD-9 Appendix E is used for coding adverse drug reactions, assisting healthcare professionals in the correct reporting of such incidents. The Medwatch program by the FDA also supports this tracking.
Step-by-step explanation:
In the ICD-9 appendices, Appendix E is utilized for coding adverse drug reactions. This appendix includes a list of drugs and chemicals, which helps healthcare professionals to report and code for adverse effects properly when a patient experiences a negative reaction to a medication. The Medwatch program is also a significant resource, provided by the FDA, to track and monitor safety information and adverse events related to drugs.