2020 ICD-10-CM Diagnosis Code T50.A26A

Underdosing of mixed bacterial vaccines without a pertussis component, initial encounter

    2016 2017 2018 2019 2020 Billable/Specific Code
  • T50.A26A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Underdosing of mixed bacterial vaccines w/o a pertuss, init
  • The 2020 edition of ICD-10-CM T50.A26A became effective on October 1, 2019.
  • This is the American ICD-10-CM version of T50.A26A - other international versions of ICD-10 T50.A26A may differ.
The following code(s) above T50.A26A 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 T50.A26A:
  • 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
ICD-10-CM T50.A26A is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 951 Other factors influencing health status

Convert T50.A26A to ICD-9-CM

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): No change
ICD-10-CM Codes Adjacent To T50.A26A
T50.A23S …… sequela
T50.A24 Poisoning by mixed bacterial vaccines without a pertussis component, undetermined
T50.A24A …… initial encounter
T50.A24D …… subsequent encounter
T50.A24S …… sequela
T50.A25 Adverse effect of mixed bacterial vaccines without a pertussis component
T50.A25A …… initial encounter
T50.A25D …… subsequent encounter
T50.A25S …… sequela
T50.A26 Underdosing of mixed bacterial vaccines without a pertussis component
T50.A26A …… initial encounter
T50.A26D …… subsequent encounter
T50.A26S …… sequela
T50.A9 Poisoning by, adverse effect of and underdosing of other bacterial vaccines
T50.A91 Poisoning by other bacterial vaccines, accidental (unintentional)
T50.A91A …… initial encounter
T50.A91D …… subsequent encounter
T50.A91S …… sequela
T50.A92 Poisoning by other bacterial vaccines, intentional self-harm
T50.A92A …… initial encounter
T50.A92D …… subsequent encounter

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