Poisoning by oth drug/meds/biol subst, self-harm, init

This code signifies a deliberate act of self-poisoning using a substance not specifically classified elsewhere within the T50 category. It indicates that the patient intentionally ingested, injected, or otherwise administered a drug, medicament, or biological substance with the intent to cause self-harm. This is the initial encounter for the poisoning event.

Apply this code when a patient presents to an emergency department or is admitted for an overdose or toxic reaction to a substance, and medical documentation clearly states the act was intentional self-harm. This is appropriate when the specific substance is not detailed enough to assign a more specific T50 code (e.g., "overdose on multiple medications" without further specification of drug classes). It should only be used for the first time the patient is seen for this particular poisoning episode.

• Always sequence this code after the specific substance code (if known and more specific) from categories T36-T50, if applicable.
• Requires documentation of "intentional self-harm" and "initial encounter" to be assigned.
• Do not use if the poisoning was accidental, assault, or undetermined intent; different codes apply for those scenarios.