2017/18 ICD-10-CM Diagnosis Code T42.5X6A

Underdosing of mixed antiepileptics, initial encounter

The following code(s) above T42.5X6A 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 T42.5X6A:
  • S00-T88
    2018 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
    2018 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
  • T42
    ICD-10-CM Diagnosis Code T42

    Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs

      2016 2017 2018 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 antiepileptic, sedative- hypnotic and antiparkinsonism drugs
ICD-10-CM T42.5X6A is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert T42.5X6A to ICD-9-CM

Code History
ICD-10-CM Codes Adjacent To T42.5X6A
T42.5X3S …… sequela
T42.5X4 Poisoning by mixed antiepileptics, undetermined
T42.5X4A …… initial encounter
T42.5X4D …… subsequent encounter
T42.5X4S …… sequela
T42.5X5 Adverse effect of mixed antiepileptics
T42.5X5A …… initial encounter
T42.5X5D …… subsequent encounter
T42.5X5S …… sequela
T42.5X6 Underdosing of mixed antiepileptics
T42.5X6A …… initial encounter
T42.5X6D …… subsequent encounter
T42.5X6S …… sequela
T42.6 Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs
T42.6X Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs
T42.6X1 Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional)
T42.6X1A …… initial encounter
T42.6X1D …… subsequent encounter
T42.6X1S …… sequela
T42.6X2 Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm
T42.6X2A …… initial encounter

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