Personal history of allergy to anesthetic agent

This code indicates a patient's documented past adverse reaction or hypersensitivity to an anesthetic medication. This history is significant for future medical procedures requiring anesthesia, as it necessitates careful selection of alternative agents to prevent recurrence. It does not signify a current active allergic reaction.

Apply this code when a patient's medical record clearly states a previous allergic response to an anesthetic agent. This is particularly relevant during pre-operative assessments or when updating a patient's comprehensive medical history. It should be used even if the patient is not currently experiencing symptoms.

• Always verify the specific anesthetic agent involved if possible, though this code is general.
• Do not use this code for adverse effects that are not allergic in nature (e.g., nausea, dizziness) unless explicitly documented as an allergic reaction.
• This is a historical code; it should be used in conjunction with other codes describing the current encounter.