Underdosing of peripheral vasodilators, initial encounter

This code signifies a patient's condition resulting from taking less than the prescribed or recommended dose of a peripheral vasodilator. This underdosing has led to an adverse effect or a worsening of the underlying condition for which the medication was prescribed. It indicates that the patient's current medical issue is directly attributable to insufficient medication intake.

Use this code when a patient presents with symptoms or complications due to not taking enough of a peripheral vasodilator, such as worsening claudication or Raynaud's phenomenon. This applies when the physician explicitly documents that the patient's current clinical state is a direct consequence of underdosing this specific class of medication. It should be assigned for the initial encounter where the underdosing is identified and treated.

• Always assign an additional code for the specific adverse effect or manifestation of the underdosing.
• Ensure documentation clearly states the patient's condition is due to underdosing and not noncompliance or medication error by a healthcare provider.
• This "A" seventh character is only for the initial encounter for this specific underdosing event. Subsequent encounters would use "D" or "S".