Now, not every medication encounter fits neatly under z79.899 Let’s walk through other codes that better describe specific situations. Learn how to accurately document and code chronic conditions and maintenance medications. Z79.899 is a billable diagnosis code used to specify a medical diagnosis of other long term (current) drug therapy View code's billable status, notations, version history, related codes, and more. This code is grouped under diagnosis codes for factors influencing health status and contact with health services.
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