Dermatitis due to other specified substances taken internally

This code signifies an inflammatory skin reaction caused by an ingested substance, excluding adverse drug reactions. It represents a systemic dermatologic manifestation triggered by internal exposure to a specific, non-medicinal agent.

Apply this code when documentation clearly indicates dermatitis resulting from the ingestion of a substance other than a therapeutic drug. Examples include allergic reactions to food additives, environmental toxins, or other chemicals taken internally. The physician's notes should specify the causative agent and its internal route of exposure.

• Differentiate carefully from adverse drug reactions (ADRs), which have their own specific codes.
• Requires documentation of the specific ingested substance causing the dermatitis.
• Consider an additional E-code to identify the external cause of poisoning or adverse effect, if applicable.