Underdosing of propionic acid derivatives, initial encounter

This code signifies that a patient has experienced adverse effects or a lack of therapeutic benefit due to receiving an insufficient dose of a propionic acid derivative medication. These medications are commonly nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen. The "initial encounter" designation indicates that this is the first time the patient is being seen for this specific underdosing event.

Apply this code when documentation clearly states a patient's condition worsened or failed to improve because they did not receive enough of a propionic acid derivative. This could be due to patient non-compliance, a prescribing error, or a dispensing error. Use this code when the patient is presenting for the initial evaluation and management of the underdosing.

• Always sequence this code after the code(s) for the specific adverse effect or condition being treated.
• Ensure documentation explicitly states "underdosing" and identifies the drug class as a propionic acid derivative.
• Verify the "initial encounter" designation is appropriate for the patient's visit. Subsequent visits for the same underdosing event would use a different seventh character.