Underdosing of peripheral vasodilators, sequela

This code indicates a long-term consequence or complication arising from the patient's insufficient intake or administration of peripheral vasodilators. These sequelae are the residual effects that persist after the acute phase of underdosing has passed, such as chronic circulatory issues or worsening of underlying vascular conditions.

Use this code when documenting a condition that is a direct result of a past underdosing of medications intended to widen blood vessels in the extremities. This applies when the underdosing event itself is no longer active, but its lasting impact on the patient's health is being treated or evaluated. Examples include chronic limb ischemia or persistent claudication attributed to previous inadequate vasodilator therapy.

• Always assign an additional code(s) to specify the nature of the sequela (e.g., specific circulatory disorder).
• This "S" seventh character indicates a sequela, meaning the residual effect of a past condition, not the active underdosing event.
• Do not use this code for active underdosing; refer to the appropriate acute underdosing code for that scenario.