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 994 Poisoning by other drugs, medicaments and biological substances, undetermined
 * T50.995 Adverse effect of other drugs, medicaments and biological substances
 * T50.996 Underdosing of other drugs, medicaments and biological substances

=Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)=
 * Use additional code(s) for all associated manifestations of toxic effect, such as:
 * respiratory conditions due to external agents (J60-J70)
 * When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined
 * Excludes1: contact with and (suspected) exposure to toxic substances (Z77.-)

T51 Toxic effect of alcohol

 * The appropriate 7th character is to be added to each code from category T51 
 * A initial encounter
 * D subsequent encounter
 * S sequela
 * T51.0 Toxic effect of ethanol
 * Toxic effect of ethyl alcohol
 * Excludes2: acute alcohol intoxication or "hangover" effects (F10.11, F10.31, F10.91)
 * drunkenness (F10.11, F10.31, F10.91)
 * pathological alcohol intoxication (F10.11, F10.31, F10.91)
 * T51.0x Toxic effect of ethanol
 * T51.0x1 Toxic effect of ethanol, accidental (unintentional)
 * Toxic effect of ethanol NOS
 * T51.0x2 Toxic effect of ethanol, intentional self-harm
 * T51.0x3 Toxic effect of ethanol, assault
 * T51.0x4 Toxic effect of ethanol, undetermined
 * T51.1 Toxic effect of methanol
 * Toxic effect of methyl alcohol
 * T51.1x Toxic effect of methanol
 * T51.1x1 Toxic effect of methanol, accidental (unintentional)
 * Toxic effect of methanol NOS
 * T51.1x2 Toxic effect of methanol, intentional self-harm
 * T51.1x3 Toxic effect of methanol, assault
 * T51.1x4 Toxic effect of methanol, undetermined