Adverse effect of iron and its compounds, initial encounter

This code signifies a patient experiencing an unintended and undesirable reaction to iron or iron-containing compounds when administered therapeutically. This adverse effect occurs despite correct dosage and administration, distinguishing it from poisoning or overdose.

Apply this code when a patient develops symptoms such as gastrointestinal upset, allergic reactions, or other systemic effects due to prescribed iron supplementation (e.g., for anemia) or iron-containing medications. This code is specifically for the initial presentation of these adverse effects.

• Always sequence this code after the code for the specific manifestation of the adverse effect (e.g., nausea, rash).
• Ensure documentation clearly states the reaction was an adverse effect, not an overdose or poisoning.
• Verify that this is indeed the initial encounter for this specific adverse effect; subsequent encounters would use a different seventh character.