Disorder involving the immune mechanism, unspecified

This code signifies an uncharacterized dysfunction of the body's immune system. It indicates that a patient has a documented immune system disorder, but the specific nature or type of that disorder has not been identified or specified by the provider.

This code is appropriate when documentation clearly states an "immune disorder, unspecified" or "disorder of immune mechanism, NOS." It should be used only when no further details about the specific type of immune dysfunction are available or can be reasonably inferred from the medical record. Avoid using this code if a more specific immune disorder diagnosis is documented.

• Always strive for a more specific immune disorder code if documentation permits.
• Query the provider for clarification if "immune disorder" is mentioned without further detail.
• This code is a last resort when no other specific immune mechanism disorder can be assigned.