T50.A — Poisoning by, adverse effect of and underdosing of bacterial vaccines
Not billable
Is T50.A billable?
No — T50.A is a non-billable header code. T50.A 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 54 billable codes beneath T50.A.
Billable codes under this header
- T50.A11APoisoning by pertussis vaccine, including combinations with a pertussis component, accidental (unintentional), initial encounter
- T50.A11DPoisoning by pertussis vaccine, including combinations with a pertussis component, accidental (unintentional), subsequent encounter
- T50.A11SPoisoning by pertussis vaccine, including combinations with a pertussis component, accidental (unintentional), sequela
- T50.A12APoisoning by pertussis vaccine, including combinations with a pertussis component, intentional self-harm, initial encounter
- T50.A12DPoisoning by pertussis vaccine, including combinations with a pertussis component, intentional self-harm, subsequent encounter
- T50.A12SPoisoning by pertussis vaccine, including combinations with a pertussis component, intentional self-harm, sequela
- T50.A13APoisoning by pertussis vaccine, including combinations with a pertussis component, assault, initial encounter
- T50.A13DPoisoning by pertussis vaccine, including combinations with a pertussis component, assault, subsequent encounter
- T50.A13SPoisoning by pertussis vaccine, including combinations with a pertussis component, assault, sequela
- T50.A14APoisoning by pertussis vaccine, including combinations with a pertussis component, undetermined, initial encounter
- T50.A14DPoisoning by pertussis vaccine, including combinations with a pertussis component, undetermined, subsequent encounter
- T50.A14SPoisoning by pertussis vaccine, including combinations with a pertussis component, undetermined, sequela
- T50.A15AAdverse effect of pertussis vaccine, including combinations with a pertussis component, initial encounter
- T50.A15DAdverse effect of pertussis vaccine, including combinations with a pertussis component, subsequent encounter
- T50.A15SAdverse effect of pertussis vaccine, including combinations with a pertussis component, sequela
- T50.A16AUnderdosing of pertussis vaccine, including combinations with a pertussis component, initial encounter
- T50.A16DUnderdosing of pertussis vaccine, including combinations with a pertussis component, subsequent encounter
- T50.A16SUnderdosing of pertussis vaccine, including combinations with a pertussis component, sequela
- 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.A91APoisoning by other bacterial vaccines, accidental (unintentional), initial encounter
- T50.A91DPoisoning by other bacterial vaccines, accidental (unintentional), subsequent encounter
- T50.A91SPoisoning by other bacterial vaccines, accidental (unintentional), sequela
- T50.A92APoisoning by other bacterial vaccines, intentional self-harm, initial encounter
- T50.A92DPoisoning by other bacterial vaccines, intentional self-harm, subsequent encounter
- T50.A92SPoisoning by other bacterial vaccines, intentional self-harm, sequela
- T50.A93APoisoning by other bacterial vaccines, assault, initial encounter
- T50.A93DPoisoning by other bacterial vaccines, assault, subsequent encounter
- T50.A93SPoisoning by other bacterial vaccines, assault, sequela
- T50.A94APoisoning by other bacterial vaccines, undetermined, initial encounter
- T50.A94DPoisoning by other bacterial vaccines, undetermined, subsequent encounter
- T50.A94SPoisoning by other bacterial vaccines, undetermined, sequela
- T50.A95AAdverse effect of other bacterial vaccines, initial encounter
- T50.A95DAdverse effect of other bacterial vaccines, subsequent encounter
- T50.A95SAdverse effect of other bacterial vaccines, sequela
- T50.A96AUnderdosing of other bacterial vaccines, initial encounter
- T50.A96DUnderdosing of other bacterial vaccines, subsequent encounter
- T50.A96SUnderdosing of other bacterial vaccines, sequela
T50.A at a glance
| Code | T50.A |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of bacterial vaccines |
| 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.A 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.A. T50.A 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.A to fully describe the condition. T50.A 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.A to fully describe the condition. T50.A is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T50.A, but a patient may have both at the same time. When documentation supports it, T50.A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T50.A, but a patient may have both at the same time. When documentation supports it, T50.A and the excluded code may both be reported.
What codes fall under T50.A? (3)
- T50.A1Poisoning by, adverse effect of and underdosing of pertussis vaccine, including combinations with a pertussis componentnot billable
- T50.A2Poisoning by, adverse effect of and underdosing of mixed bacterial vaccines without a pertussis componentnot billable
- T50.A9Poisoning by, adverse effect of and underdosing of other bacterial vaccinesnot billable
How long has T50.A existed?
T50.A has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
What other codes are in the T50 family? (12)
- T50.0Poisoning by, adverse effect of and underdosing of mineralocorticoids and their antagonistsnot billable
- T50.1Poisoning by, adverse effect of and underdosing of loop [high-ceiling] diureticsnot billable
- T50.2Poisoning by, adverse effect of and underdosing of carbonic-anhydrase inhibitors, benzothiadiazides and other diureticsnot billable
- T50.3Poisoning by, adverse effect of and underdosing of electrolytic, caloric and water-balance agentsnot billable
- T50.4Poisoning by, adverse effect of and underdosing of drugs affecting uric acid metabolismnot billable
- T50.5Poisoning by, adverse effect of and underdosing of appetite depressantsnot billable
- T50.6Poisoning by, adverse effect of and underdosing of antidotes and chelating agentsnot billable
- T50.7Poisoning by, adverse effect of and underdosing of analeptics and opioid receptor antagonistsnot billable
- T50.8Poisoning by, adverse effect of and underdosing of diagnostic agentsnot billable
- T50.BPoisoning by, adverse effect of and underdosing of viral vaccinesnot billable
- T50.ZPoisoning by, adverse effect of and underdosing of other vaccines and biological substancesnot billable
- T50.9Poisoning by, adverse effect of and underdosing of other and unspecified drugs, medicaments and biological substancesnot billable