We have been told to report code Z79.899, other long-term (current) drug therapy, for follow-up visits with patients diagnosed with attention-deficit/hyperactivity disorder (ADHD) and to only report the codes for ADHD at the initial encounter. Is this correct?

No. ADHD is a chronic condition that may be reported for as long as it is being managed by the physician per International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) guidelines. Z79.899 is a status code. Status codes indicate that a patient is a carrier of a disease or has the sequelae or residual of a past disease or condition. This includes such things as the presence of prosthetic or mechanical devices resulting from past treatment. A status code is informative because the status may affect the course of treatment and its outcome.

Z79.899 may be a secondary code to indicate that long- term use of medication affected the...

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