Resistance to unspecified antimicrobial drugs

This code signifies that a patient's infection or condition is resistant to an antimicrobial drug, but the specific class or type of drug to which it is resistant has not been identified or documented. It indicates a general, unspecific antimicrobial resistance.

Use this code when documentation clearly states antimicrobial resistance, but the specific drug or drug class (e.g., penicillin, cephalosporin) is not specified. This may occur when initial cultures show resistance, but further susceptibility testing is pending or not yet available, or when the documentation is simply vague.

• Always strive for a more specific resistance code if the drug class is known.
• This code is a last resort when no other specific resistance code can be assigned.
• Do not use if the resistance is to a non-antimicrobial drug (e.g., chemotherapy).