Other nonmedicinal substance allergy status

This code indicates a patient's historical or current allergic reaction to non-drug, non-food substances not specified elsewhere. This includes sensitivities to environmental agents, chemicals, or materials that trigger an immune response. It signifies a predisposition to adverse reactions upon exposure to these substances.

Use this code when documenting a patient's allergy to substances like latex, dyes (e.g., contrast media), specific chemicals (e.g., cleaning products), or environmental allergens not classified as food or medication. This is appropriate for patients with a known history of such allergies, even if they are not currently experiencing a reaction.

• Always seek to identify the specific nonmedicinal substance if known and code to a more specific Z91.04- category if available.
• Do not use this code for current allergic reactions; instead, code the acute allergic reaction and the specific allergen if known.
• This code is for allergy status, indicating a past history or current sensitivity, not an active allergic episode.