T49.4 — Poisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations
Is T49.4 billable?
No — T49.4 is a non-billable header code. T49.4 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 T49.4.
Billable codes under this header
- T49.4X1APoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, accidental (unintentional), initial encounter
- T49.4X1DPoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, accidental (unintentional), subsequent encounter
- T49.4X1SPoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, accidental (unintentional), sequela
- T49.4X2APoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, intentional self-harm, initial encounter
- T49.4X2DPoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, intentional self-harm, subsequent encounter
- T49.4X2SPoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, intentional self-harm, sequela
- T49.4X3APoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, assault, initial encounter
- T49.4X3DPoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, assault, subsequent encounter
- T49.4X3SPoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, assault, sequela
- T49.4X4APoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, undetermined, initial encounter
- T49.4X4DPoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, undetermined, subsequent encounter
- T49.4X4SPoisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, undetermined, sequela
- T49.4X5AAdverse effect of keratolytics, keratoplastics, and other hair treatment drugs and preparations, initial encounter
- T49.4X5DAdverse effect of keratolytics, keratoplastics, and other hair treatment drugs and preparations, subsequent encounter
- T49.4X5SAdverse effect of keratolytics, keratoplastics, and other hair treatment drugs and preparations, sequela
- T49.4X6AUnderdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations, initial encounter
- T49.4X6DUnderdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations, subsequent encounter
- T49.4X6SUnderdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations, sequela
T49.4 at a glance
| Code | T49.4 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations |
| 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 T49.4 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-)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T49.4. T49.4 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T49.4 to fully describe the condition. T49.4 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 T49.4 to fully describe the condition. T49.4 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T49.4, but a patient may have both at the same time. When documentation supports it, T49.4 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T49.4, but a patient may have both at the same time. When documentation supports it, T49.4 and the excluded code may both be reported.
What codes fall under T49.4? (1)
How long has T49.4 existed?
T49.4 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 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
- T49.5Poisoning 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
- T49.9Poisoning by, adverse effect of and underdosing of unspecified topical agentnot billable