T45.3X — Poisoning by, adverse effect of and underdosing of enzymes
Is T45.3X billable?
No — T45.3X is a non-billable header code. T45.3X 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 T45.3X.
Billable codes under this header
- T45.3X1APoisoning by enzymes, accidental (unintentional), initial encounter
- T45.3X1DPoisoning by enzymes, accidental (unintentional), subsequent encounter
- T45.3X1SPoisoning by enzymes, accidental (unintentional), sequela
- T45.3X2APoisoning by enzymes, intentional self-harm, initial encounter
- T45.3X2DPoisoning by enzymes, intentional self-harm, subsequent encounter
- T45.3X2SPoisoning by enzymes, intentional self-harm, sequela
- T45.3X3APoisoning by enzymes, assault, initial encounter
- T45.3X3DPoisoning by enzymes, assault, subsequent encounter
- T45.3X3SPoisoning by enzymes, assault, sequela
- T45.3X4APoisoning by enzymes, undetermined, initial encounter
- T45.3X4DPoisoning by enzymes, undetermined, subsequent encounter
- T45.3X4SPoisoning by enzymes, undetermined, sequela
- T45.3X5AAdverse effect of enzymes, initial encounter
- T45.3X5DAdverse effect of enzymes, subsequent encounter
- T45.3X5SAdverse effect of enzymes, sequela
- T45.3X6AUnderdosing of enzymes, initial encounter
- T45.3X6DUnderdosing of enzymes, subsequent encounter
- T45.3X6SUnderdosing of enzymes, sequela
T45.3X at a glance
| Code | T45.3X |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of enzymes |
| 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 T45.3X 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 T45.3X. T45.3X describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T45.3X to fully describe the condition. T45.3X 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 T45.3X to fully describe the condition. T45.3X is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T45.3X, but a patient may have both at the same time. When documentation supports it, T45.3X and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T45.3X, but a patient may have both at the same time. When documentation supports it, T45.3X and the excluded code may both be reported.
What codes fall under T45.3X? (6)
- T45.3X1Poisoning by enzymes, accidental (unintentional)not billable
- T45.3X2Poisoning by enzymes, intentional self-harmnot billable
- T45.3X3Poisoning by enzymes, assaultnot billable
- T45.3X4Poisoning by enzymes, undeterminednot billable
- T45.3X5Adverse effect of enzymesnot billable
- T45.3X6Underdosing of enzymesnot billable
How long has T45.3X existed?
T45.3X 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.