T49.8X — Poisoning by, adverse effect of and underdosing of other topical agents
Is T49.8X billable?
No — T49.8X is a non-billable header code. T49.8X 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 T49.8X.
Billable codes under this header
- T49.8X1APoisoning by other topical agents, accidental (unintentional), initial encounter
- T49.8X1DPoisoning by other topical agents, accidental (unintentional), subsequent encounter
- T49.8X1SPoisoning by other topical agents, accidental (unintentional), sequela
- T49.8X2APoisoning by other topical agents, intentional self-harm, initial encounter
- T49.8X2DPoisoning by other topical agents, intentional self-harm, subsequent encounter
- T49.8X2SPoisoning by other topical agents, intentional self-harm, sequela
- T49.8X3APoisoning by other topical agents, assault, initial encounter
- T49.8X3DPoisoning by other topical agents, assault, subsequent encounter
- T49.8X3SPoisoning by other topical agents, assault, sequela
- T49.8X4APoisoning by other topical agents, undetermined, initial encounter
- T49.8X4DPoisoning by other topical agents, undetermined, subsequent encounter
- T49.8X4SPoisoning by other topical agents, undetermined, sequela
- T49.8X5AAdverse effect of other topical agents, initial encounter
- T49.8X5DAdverse effect of other topical agents, subsequent encounter
- T49.8X5SAdverse effect of other topical agents, sequela
- T49.8X6AUnderdosing of other topical agents, initial encounter
- T49.8X6DUnderdosing of other topical agents, subsequent encounter
- T49.8X6SUnderdosing of other topical agents, sequela
T49.8X at a glance
| Code | T49.8X |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of other topical agents |
| 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 T49.8X 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 T49.8X. T49.8X describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T49.8X to fully describe the condition. T49.8X 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 T49.8X to fully describe the condition. T49.8X is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T49.8X, but a patient may have both at the same time. When documentation supports it, T49.8X and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T49.8X, but a patient may have both at the same time. When documentation supports it, T49.8X and the excluded code may both be reported.
What codes fall under T49.8X? (6)
- T49.8X1Poisoning by other topical agents, accidental (unintentional)not billable
- T49.8X2Poisoning by other topical agents, intentional self-harmnot billable
- T49.8X3Poisoning by other topical agents, assaultnot billable
- T49.8X4Poisoning by other topical agents, undeterminednot billable
- T49.8X5Adverse effect of other topical agentsnot billable
- T49.8X6Underdosing of other topical agentsnot billable
How long has T49.8X existed?
T49.8X 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.