Underdosing of nonsteroidal anti-inflammatory drugs, init

This code signifies a patient's condition resulting from taking less than the prescribed or recommended dose of an NSAID other than aspirin, salicylates, or propionic acid derivatives. This underdosing leads to a negative clinical outcome or exacerbation of the condition the NSAID was intended to treat.

Use this code when a patient presents with symptoms or an untreated condition directly attributable to not taking enough of an NSAID (e.g., ibuprofen, naproxen, celecoxib) as prescribed. This applies to the initial encounter for this specific underdosing event, such as when the patient first seeks medical attention for the consequences of the insufficient dosage.

• Always sequence this code after the code(s) for the specific condition(s) being treated or the adverse effect(s) of the underdosing.
• Ensure the documentation clearly specifies "underdosing" and identifies the drug as an NSAID not classified elsewhere.
• Verify that this is the initial encounter for the underdosing event; subsequent encounters would use the appropriate seventh character.