Georgia Subscriber
Answer: The E code is probably inappropriate and unnecessary, especially since you do not know the exact cause of the patients nausea. E codes are a supplemental classification of external causes of injury or poisoning and can be reported only as a secondary diagnosis. Use of E codes among gastroenterology practices is probably limited to the following codes:
E858.4 accidental poisoning by other drugs; agents primarily affecting gastrointestinal system
E861 accidental poisoning by cleansing and polishing agents, disinfectants, paints, and varnishes
E864 accidental poisoning by corrosives and caustics, not elsewhere classified
E930-E949 drugs, medicinal and biological substances causing adverse effects in therapeutic use
E950-E959 suicide and self-inflicted injury
E980-E989 injury undetermined whether accidentally or purposely inflicted
E985 injury by firearms, air guns and explosives, undetermined whether accidentally or purposely inflicted.
Note: All codes should be coded to the highest level of specificity. Often a fourth digit is required.
The payer may interpret E879.9 to mean the gastroenterologist did something wrong to cause the patients nausea and deny payment for the emergency-room visit. And since the nausea could have been caused by many things, such as the Axid, you should not use this code unless specifically directed by the gastroenterologist to do so.