ICD-10-CM › S00-T88 › T36-T50 › T40.49 Poisoning by, adverse effect of... › T40.495

T40.495

Adverse effect of other synthetic narcotics

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2021 onwards. It has never been valid for submission on its own.

Submit one of these 3 more specific codes instead:

  • T40.495A Adverse effect of other synthetic narcotics, initial encounter
  • T40.495D Adverse effect of other synthetic narcotics, subsequent encounter
  • T40.495S Adverse effect of other synthetic narcotics, sequela

This code requires a seventh character. See the rule below.

What has happened to this code

Every change the publisher made, from 2021 to now.

  1. FY2021 Added to the code set Adverse effect of other synthetic narcotics

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from T40 Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]

Seventh character required

  • The appropriate 7th character is to be added to each code from category T40

Excludes2 - not included here

  • drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)

Inherited from the T36-T50 section Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)

Excludes1 - never coded here

  • toxic reaction to local anesthesia in pregnancy (O29.3-)

Excludes2 - not included here

  • abuse and dependence of psychoactive substances (F10-F19)
  • abuse of non-dependence-producing substances (F55.-)
  • immunodeficiency due to drugs (D84.821)
  • drug reaction and poisoning affecting newborn (P00-P96)
  • pathological drug intoxication (inebriation) (F10-F19)

Use additional code

  • code(s) to specify:
  • manifestations of poisoning
  • underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
  • underdosing of medication regimen (Z91.12-, Z91.13-)

Code first

  • , for adverse effects, the nature of the adverse effect, such as:
  • adverse effect NOS (T88.7)
  • aspirin gastritis (K29.-)
  • blood disorders (D56-D76)
  • contact dermatitis (L23-L25)
  • dermatitis due to substances taken internally (L27.-)
  • nephropathy (N14.0-N14.2)

Includes

  • adverse effect of correct substance properly administered
  • poisoning by overdose of substance
  • poisoning by wrong substance given or taken in error
  • underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed

Note

  • The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Codes in the same group

CodeDescriptionStatus
T40.491 Poisoning by other synthetic narcotics, accidental (unintentional) Not billable
T40.492 Poisoning by other synthetic narcotics, intentional self-harm Not billable
T40.493 Poisoning by other synthetic narcotics, assault Not billable
T40.494 Poisoning by other synthetic narcotics, undetermined Not billable
T40.496 Underdosing of other synthetic narcotics Not billable