Undrdose of slctv seroton/norepineph reup inhibtr, sequela

This code signifies a patient's current health issue or condition that is a direct result of not taking enough selective serotonin and norepinephrine reuptake inhibitors (SNRIs) in the past. This underdosing event led to a long-term or permanent consequence that is now being treated. The focus is on the lasting impact, not the acute underdosing itself.

Apply this code when documenting a sequela (e.g., chronic depression, anxiety disorder, or other persistent mental health conditions) that is attributed to a historical instance of insufficient SNRI medication intake. This is appropriate when the patient is presenting for treatment of the residual effect, and the underdosing is identified as the root cause of the current problem.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., major depressive disorder).
• Ensure documentation clearly links the current condition to a past underdosing event of an SNRI.
• The "S" seventh character indicates sequela, meaning the patient is being treated for the residual effect of the underdosing, not the active underdosing itself.