T50.A2 — Poisoning by, adverse effect of and underdosing of mixed bacterial vaccines without a pertussis component
Is T50.A2 billable?
No — T50.A2 is a non-billable header code. T50.A2 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 18 billable codes beneath T50.A2.
Billable codes under this header
- T50.A21APoisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional), initial encounter
- T50.A21DPoisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional), subsequent encounter
- T50.A21SPoisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional), sequela
- T50.A22APoisoning by mixed bacterial vaccines without a pertussis component, intentional self-harm, initial encounter
- T50.A22DPoisoning by mixed bacterial vaccines without a pertussis component, intentional self-harm, subsequent encounter
- T50.A22SPoisoning by mixed bacterial vaccines without a pertussis component, intentional self-harm, sequela
- T50.A23APoisoning by mixed bacterial vaccines without a pertussis component, assault, initial encounter
- T50.A23DPoisoning by mixed bacterial vaccines without a pertussis component, assault, subsequent encounter
- T50.A23SPoisoning by mixed bacterial vaccines without a pertussis component, assault, sequela
- T50.A24APoisoning by mixed bacterial vaccines without a pertussis component, undetermined, initial encounter
- T50.A24DPoisoning by mixed bacterial vaccines without a pertussis component, undetermined, subsequent encounter
- T50.A24SPoisoning by mixed bacterial vaccines without a pertussis component, undetermined, sequela
- T50.A25AAdverse effect of mixed bacterial vaccines without a pertussis component, initial encounter
- T50.A25DAdverse effect of mixed bacterial vaccines without a pertussis component, subsequent encounter
- T50.A25SAdverse effect of mixed bacterial vaccines without a pertussis component, sequela
- T50.A26AUnderdosing of mixed bacterial vaccines without a pertussis component, initial encounter
- T50.A26DUnderdosing of mixed bacterial vaccines without a pertussis component, subsequent encounter
- T50.A26SUnderdosing of mixed bacterial vaccines without a pertussis component, sequela
T50.A2 at a glance
| Code | T50.A2 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of mixed bacterial vaccines without a pertussis component |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T50.A2 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T50.A2. T50.A2 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T50.A2 to fully describe the condition. T50.A2 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T36-T50
Report an additional code alongside T50.A2 to fully describe the condition. T50.A2 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T50.A2, but a patient may have both at the same time. When documentation supports it, T50.A2 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T50.A2, but a patient may have both at the same time. When documentation supports it, T50.A2 and the excluded code may both be reported.
What codes fall under T50.A2? (6)
- T50.A21Poisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional)not billable
- T50.A22Poisoning by mixed bacterial vaccines without a pertussis component, intentional self-harmnot billable
- T50.A23Poisoning by mixed bacterial vaccines without a pertussis component, assaultnot billable
- T50.A24Poisoning by mixed bacterial vaccines without a pertussis component, undeterminednot billable
- T50.A25Adverse effect of mixed bacterial vaccines without a pertussis componentnot billable
- T50.A26Underdosing of mixed bacterial vaccines without a pertussis componentnot billable
How long has T50.A2 existed?
T50.A2 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
- FY2019Poisoning by, adverse effect of and underdosing of mixed bacterial vaccines without a pertussis componentPoisoning by, adverse effect of and underdosing of mixed bacterial vaccines without a pertussis component
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.