T49.9 — Poisoning by, adverse effect of and underdosing of unspecified topical agent
Is T49.9 billable?
No — T49.9 is a non-billable header code. T49.9 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 T49.9.
Billable codes under this header
- T49.91XAPoisoning by unspecified topical agent, accidental (unintentional), initial encounter
- T49.91XDPoisoning by unspecified topical agent, accidental (unintentional), subsequent encounter
- T49.91XSPoisoning by unspecified topical agent, accidental (unintentional), sequela
- T49.92XAPoisoning by unspecified topical agent, intentional self-harm, initial encounter
- T49.92XDPoisoning by unspecified topical agent, intentional self-harm, subsequent encounter
- T49.92XSPoisoning by unspecified topical agent, intentional self-harm, sequela
- T49.93XAPoisoning by unspecified topical agent, assault, initial encounter
- T49.93XDPoisoning by unspecified topical agent, assault, subsequent encounter
- T49.93XSPoisoning by unspecified topical agent, assault, sequela
- T49.94XAPoisoning by unspecified topical agent, undetermined, initial encounter
- T49.94XDPoisoning by unspecified topical agent, undetermined, subsequent encounter
- T49.94XSPoisoning by unspecified topical agent, undetermined, sequela
- T49.95XAAdverse effect of unspecified topical agent, initial encounter
- T49.95XDAdverse effect of unspecified topical agent, subsequent encounter
- T49.95XSAdverse effect of unspecified topical agent, sequela
- T49.96XAUnderdosing of unspecified topical agent, initial encounter
- T49.96XDUnderdosing of unspecified topical agent, subsequent encounter
- T49.96XSUnderdosing of unspecified topical agent, sequela
T49.9 at a glance
| Code | T49.9 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of unspecified topical agent |
| 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 T49.9 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 T49.9. T49.9 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T49.9 to fully describe the condition. T49.9 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 T49.9 to fully describe the condition. T49.9 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T49.9, but a patient may have both at the same time. When documentation supports it, T49.9 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T49.9, but a patient may have both at the same time. When documentation supports it, T49.9 and the excluded code may both be reported.
What codes fall under T49.9? (6)
- T49.91Poisoning by unspecified topical agent, accidental (unintentional)not billable
- T49.92Poisoning by unspecified topical agent, intentional self-harmnot billable
- T49.93Poisoning by unspecified topical agent, assaultnot billable
- T49.94Poisoning by unspecified topical agent, undeterminednot billable
- T49.95Adverse effect of unspecified topical agentnot billable
- T49.96Underdosing of unspecified topical agentnot billable
How long has T49.9 existed?
T49.9 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 T49 family? (9)
- T49.0Poisoning by, adverse effect of and underdosing of local antifungal, anti-infective and anti-inflammatory drugsnot billable
- T49.1Poisoning by, adverse effect of and underdosing of antipruriticsnot billable
- T49.2Poisoning by, adverse effect of and underdosing of local astringents and local detergentsnot billable
- T49.3Poisoning by, adverse effect of and underdosing of emollients, demulcents and protectantsnot billable
- T49.4Poisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparationsnot billable
- T49.5Poisoning by, adverse effect of and underdosing of ophthalmological drugs and preparationsnot billable
- T49.6Poisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparationsnot billable
- T49.7Poisoning by, adverse effect of and underdosing of dental drugs, topically appliednot billable
- T49.8Poisoning by, adverse effect of and underdosing of other topical agentsnot billable