Gen skin eruption due to drugs and meds taken internally

This code signifies a widespread skin rash or eruption that is a systemic reaction to a medication ingested or administered internally. It encompasses various morphologies, such as maculopapular, urticarial, or eczematous, that are directly attributable to a drug. The eruption is not localized but affects a significant portion of the body surface.

Apply this code when documentation clearly links a generalized cutaneous reaction to an internally administered drug, such as an oral antibiotic, injected contrast agent, or intravenously infused chemotherapy. Supporting documentation should include the patient's history of medication intake, the onset of the rash following drug exposure, and a physician's assessment confirming the drug as the causative agent.

• Always code the specific drug causing the adverse effect using an external cause code (T36-T50) as a secondary diagnosis.
• Distinguish from localized drug reactions (e.g., contact dermatitis due to a topical medication) or reactions to non-medicinal substances.
• Ensure the documentation specifies "generalized" to differentiate from more localized drug eruptions, which may fall under other L-codes.