Advrs effect of unsp sys anti-infect and antiparasitic, init

This code signifies an undesirable or harmful reaction experienced by a patient due to the therapeutic use of an anti-infective or antiparasitic medication, where the specific drug causing the reaction is not identified. The reaction occurred during the initial phase of treatment or investigation of the adverse effect.

This code is appropriate when a patient presents with an adverse drug reaction to an anti-infective or antiparasitic agent, but documentation does not specify the particular drug involved. It is used for the initial encounter related to the adverse effect, such as when the patient first seeks medical attention for the reaction.

• Ensure documentation clearly states the reaction is an "adverse effect" and not poisoning, underdosing, or noncompliance.
• Only use this code when the specific anti-infective or antiparasitic drug is truly unknown or not documented.
• Always sequence this code after the code(s) for the specific manifestation(s) of the adverse effect.