Poisoning by other synthetic narcotics, self-harm, init

This code signifies a patient presenting with adverse effects from intentionally self-administering synthetic narcotics other than tramadol or other specified opioids. The poisoning is a result of a deliberate act to harm oneself, and this encounter represents the initial treatment for this event.

Apply this code when documentation clearly states a patient has overdosed or experienced toxic effects from a synthetic narcotic (e.g., fentanyl, methadone, oxycodone, hydrocodone, excluding tramadol) due to a suicide attempt or other self-inflicted harm. This code is appropriate for the initial hospital visit or emergency department encounter where the poisoning is first evaluated and treated.

• Ensure the documentation specifies "intentional self-harm" and not accidental or assault.
• Verify the specific synthetic narcotic involved; if tramadol is documented, a different code in the T40.4x series would be more appropriate.
• Always sequence this code first, followed by codes for any associated mental health conditions or physical manifestations of the poisoning.