T37.4 — Poisoning by, adverse effect of and underdosing of anthelminthics
Is T37.4 billable?
No — T37.4 is a non-billable header code. T37.4 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 T37.4.
Billable codes under this header
- T37.4X1APoisoning by anthelminthics, accidental (unintentional), initial encounter
- T37.4X1DPoisoning by anthelminthics, accidental (unintentional), subsequent encounter
- T37.4X1SPoisoning by anthelminthics, accidental (unintentional), sequela
- T37.4X2APoisoning by anthelminthics, intentional self-harm, initial encounter
- T37.4X2DPoisoning by anthelminthics, intentional self-harm, subsequent encounter
- T37.4X2SPoisoning by anthelminthics, intentional self-harm, sequela
- T37.4X3APoisoning by anthelminthics, assault, initial encounter
- T37.4X3DPoisoning by anthelminthics, assault, subsequent encounter
- T37.4X3SPoisoning by anthelminthics, assault, sequela
- T37.4X4APoisoning by anthelminthics, undetermined, initial encounter
- T37.4X4DPoisoning by anthelminthics, undetermined, subsequent encounter
- T37.4X4SPoisoning by anthelminthics, undetermined, sequela
- T37.4X5AAdverse effect of anthelminthics, initial encounter
- T37.4X5DAdverse effect of anthelminthics, subsequent encounter
- T37.4X5SAdverse effect of anthelminthics, sequela
- T37.4X6AUnderdosing of anthelminthics, initial encounter
- T37.4X6DUnderdosing of anthelminthics, subsequent encounter
- T37.4X6SUnderdosing of anthelminthics, sequela
T37.4 at a glance
| Code | T37.4 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of anthelminthics |
| 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 T37.4 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-)
Excludes1 — never code together — inherited from T37
The conditions below can never be reported together with T37.4 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T37.4. T37.4 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T37.4 to fully describe the condition. T37.4 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 T37.4 to fully describe the condition. T37.4 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T37.4, but a patient may have both at the same time. When documentation supports it, T37.4 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T37.4, but a patient may have both at the same time. When documentation supports it, T37.4 and the excluded code may both be reported.
What codes fall under T37.4? (1)
How long has T37.4 existed?
T37.4 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 T37 family? (7)
- T37.0Poisoning by, adverse effect of and underdosing of sulfonamidesnot billable
- T37.1Poisoning by, adverse effect of and underdosing of antimycobacterial drugsnot billable
- T37.2Poisoning by, adverse effect of and underdosing of antimalarials and drugs acting on other blood protozoanot billable
- T37.3Poisoning by, adverse effect of and underdosing of other antiprotozoal drugsnot billable
- T37.5Poisoning by, adverse effect of and underdosing of antiviral drugsnot billable
- T37.8Poisoning by, adverse effect of and underdosing of other specified systemic anti-infectives and antiparasiticsnot billable
- T37.9Poisoning by, adverse effect of and underdosing of unspecified systemic anti-infective and antiparasiticsnot billable