Our billing software requires reporting of an external cause E code with any code in the 900–999 range. What International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) E code is appropriate for reporting anaphylactic reaction to peanuts?

An anaphylactic reaction to peanuts is reported with code 995.61. ICD-9-CM guidelines do not require reporting of an E code with all codes in the 900–999 range (though this would be appropriate with the majority of cases), so this may be a point of discussion with your software vendor. That said, there is not an E code that would accurately apply unless the physician agrees that an external cause of poisoning is appropriate. Code E865.8 may be used to report accidental poisoning by other specified foods. If documentation supports purposeful exposure by another person, code E962.1, assault by other solid or liquid substance, would apply. Code E928.9 offers a way...

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