Adverse effect of alpha-adrenoreceptor antagonists, subs

This code signifies an undesirable or harmful reaction experienced by a patient due to the therapeutic use of an alpha-adrenoreceptor antagonist, such as prazosin or tamsulosin, during a follow-up visit. These adverse effects are not due to poisoning, underdosing, or an allergic reaction, but rather an expected, though unwanted, side effect of the medication.

Use this code when a patient presents for ongoing management or evaluation of an adverse effect from an alpha-adrenoreceptor antagonist, and this is not the initial encounter for the adverse effect. Examples include persistent orthostatic hypotension, dizziness, or ejaculatory dysfunction attributed to the medication. This code is appropriate for subsequent visits after the initial diagnosis of the adverse effect.

• Always sequence this code after the code(s) for the specific manifestation of the adverse effect (e.g., R03.1 for hypotension).
• Ensure the documentation clearly states the adverse effect is due to an alpha-adrenoreceptor antagonist and that this is a subsequent encounter.
• Distinguish from poisoning (T44.6X1-), underdosing (T44.6X6-), or allergic reaction (T44.6X3-).