Underdosing of antithrombotic drugs, initial encounter

This diagnosis code signifies that a patient has received an insufficient amount of medication intended to prevent blood clot formation, leading to a potential or actual adverse health event. This underdosing occurred during the initial period of treatment for this specific adverse effect.

Apply this code when a patient presents with symptoms or complications directly attributable to not receiving enough of their prescribed antithrombotic medication. This includes situations where the dosage was too low, doses were missed, or the medication was discontinued prematurely, and the patient is being seen for the initial assessment and management of this underdosing event.

• Ensure documentation clearly links the patient's condition to the underdosing of an antithrombotic agent.
• Verify that the encounter is indeed the "initial encounter" for the management of this specific underdosing event.
• Always code any associated adverse effects or complications resulting from the underdosing.