Underdosing of antihyperlip and antiarterio drugs, init

This code signifies a patient's underdosing of medications intended to lower cholesterol or prevent hardening of the arteries. This can occur when a patient takes less than the prescribed amount, misses doses, or the prescribed dosage is insufficient to achieve the desired therapeutic effect.

Apply this code when a patient presents with symptoms or conditions related to inadequately treated hyperlipidemia or arteriosclerosis due to insufficient medication intake. This is appropriate for the initial encounter where the underdosing is identified and addressed.

• Always sequence this code after the definitive diagnosis for which the drug is prescribed (e.g., hyperlipidemia, coronary artery disease).
• Ensure documentation clearly indicates "underdosing" rather than a therapeutic failure or adverse effect.
• The "A" in the seventh character indicates an initial encounter for this specific underdosing event.