2020 ICD-10-CM Diagnosis Code T40.906

Underdosing of unspecified psychodysleptics [hallucinogens]

    2016 2017 2018 2019 2020 - Revised Code Non-Billable/Non-Specific Code
  • T40.906 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • ICD-10-CM T40.906 is a revised 2020 ICD-10-CM code that became effective on October 1, 2019.
  • This is the American ICD-10-CM version of T40.906 - other international versions of ICD-10 T40.906 may differ.
The following code(s) above T40.906 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to T40.906:
  • S00-T88
    2020 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    Note
    • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
    Type 1 Excludes
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • T36-T50
    2020 ICD-10-CM Range T36-T50

    Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances

    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.
    Type 1 Excludes
    • toxic reaction to local anesthesia in pregnancy (O29.3-)
    Type 2 Excludes
    • abuse and dependence of psychoactive substances (F10-F19)
    • abuse of non-dependence-producing substances (F55.-)
    • drug reaction and poisoning affecting newborn (P00-P96)
    • pathological drug intoxication (inebriation) (F10-F19)
    Use Additional
    • 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-)
    Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
  • T40
    ICD-10-CM Diagnosis Code T40

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

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)
    Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): Revised code
    • New description: Underdosing of unspecified psychodysleptics [hallucinogens]
    • 2019 description: Underdosing of unspecified psychodysleptics
ICD-10-CM Codes Adjacent To T40.906
T40.903D …… subsequent encounter
T40.903S …… sequela
T40.904 Poisoning by unspecified psychodysleptics [hallucinogens], undetermined
T40.904A …… initial encounter
T40.904D …… subsequent encounter
T40.904S …… sequela
T40.905 Adverse effect of unspecified psychodysleptics [hallucinogens]
T40.905A …… initial encounter
T40.905D …… subsequent encounter
T40.905S …… sequela
T40.906 Underdosing of unspecified psychodysleptics [hallucinogens]
T40.906A …… initial encounter
T40.906D …… subsequent encounter
T40.906S …… sequela
T40.99 Poisoning by, adverse effect of and underdosing of other psychodysleptics [hallucinogens]
T40.991 Poisoning by other psychodysleptics [hallucinogens], accidental (unintentional)
T40.991A …… initial encounter
T40.991D …… subsequent encounter
T40.991S …… sequela
T40.992 Poisoning by other psychodysleptics [hallucinogens], intentional self-harm
T40.992A …… initial encounter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.