T50.Z1 — Poisoning by, adverse effect of and underdosing of immunoglobulin
Is T50.Z1 billable?
No — T50.Z1 is a non-billable header code. T50.Z1 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.Z1.
Billable codes under this header
- T50.Z11APoisoning by immunoglobulin, accidental (unintentional), initial encounter
- T50.Z11DPoisoning by immunoglobulin, accidental (unintentional), subsequent encounter
- T50.Z11SPoisoning by immunoglobulin, accidental (unintentional), sequela
- T50.Z12APoisoning by immunoglobulin, intentional self-harm, initial encounter
- T50.Z12DPoisoning by immunoglobulin, intentional self-harm, subsequent encounter
- T50.Z12SPoisoning by immunoglobulin, intentional self-harm, sequela
- T50.Z13APoisoning by immunoglobulin, assault, initial encounter
- T50.Z13DPoisoning by immunoglobulin, assault, subsequent encounter
- T50.Z13SPoisoning by immunoglobulin, assault, sequela
- T50.Z14APoisoning by immunoglobulin, undetermined, initial encounter
- T50.Z14DPoisoning by immunoglobulin, undetermined, subsequent encounter
- T50.Z14SPoisoning by immunoglobulin, undetermined, sequela
- T50.Z15AAdverse effect of immunoglobulin, initial encounter
- T50.Z15DAdverse effect of immunoglobulin, subsequent encounter
- T50.Z15SAdverse effect of immunoglobulin, sequela
- T50.Z16AUnderdosing of immunoglobulin, initial encounter
- T50.Z16DUnderdosing of immunoglobulin, subsequent encounter
- T50.Z16SUnderdosing of immunoglobulin, sequela
T50.Z1 at a glance
| Code | T50.Z1 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of immunoglobulin |
| 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.Z1 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.Z1. T50.Z1 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.Z1 to fully describe the condition. T50.Z1 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.Z1 to fully describe the condition. T50.Z1 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T50.Z1, but a patient may have both at the same time. When documentation supports it, T50.Z1 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T50.Z1, but a patient may have both at the same time. When documentation supports it, T50.Z1 and the excluded code may both be reported.
What codes fall under T50.Z1? (6)
- T50.Z11Poisoning by immunoglobulin, accidental (unintentional)not billable
- T50.Z12Poisoning by immunoglobulin, intentional self-harmnot billable
- T50.Z13Poisoning by immunoglobulin, assaultnot billable
- T50.Z14Poisoning by immunoglobulin, undeterminednot billable
- T50.Z15Adverse effect of immunoglobulinnot billable
- T50.Z16Underdosing of immunoglobulinnot billable
How long has T50.Z1 existed?
T50.Z1 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.