Adverse effect of unsp general anesthetics, init encntr

This code signifies an unintended and undesirable reaction to a general anesthetic agent where the specific type of anesthetic is not documented. The patient is experiencing the initial manifestation of this adverse effect.

Apply this code when a patient presents with an adverse reaction (e.g., nausea, prolonged drowsiness, allergic response) to a general anesthetic, and the medical record does not specify which general anesthetic caused the reaction. This is for the first time the patient is being treated for this particular adverse effect.

• Always attempt to query for the specific general anesthetic agent if not documented.
• Requires an additional code to describe the specific adverse effect (e.g., R11.0 for nausea).
• The "A" seventh character indicates an initial encounter for treatment of the adverse effect.