ICD-10-CM 2027 diagnosis code
T49Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs
Not billable — use a more specific code
T49 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.Short description: Topical skin/eye/ENT/dental drugs
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T49
T49 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs. It belongs to block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: T49.0 (drugs), T49.1 (antipruritics), T49.2 (detergents), T49.3 (protectants), T49.4 (preparations), T49.5 (preparations), T49.6 (preparations), T49.7 (applied) and 2 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under T49
- T49.0Poisoning by, adverse effect of and underdosing of local antifungal, anti-infective and anti-inflammatory drugs
- T49.0XPoisoning by, adverse effect of and underdosing of local antifungal, anti-infective and anti-inflammatory drugs
- T49.0X1Poisoning by local antifungal, anti-infective and anti-inflammatory drugs, accidental (unintentional)
- T49.0X2Poisoning by local antifungal, anti-infective and anti-inflammatory drugs, intentional self-harm
- T49.0X3Poisoning by local antifungal, anti-infective and anti-inflammatory drugs, assault
- T49.0X4Poisoning by local antifungal, anti-infective and anti-inflammatory drugs, undetermined
- T49.0X5Adverse effect of local antifungal, anti-infective and anti-inflammatory drugs
- T49.0X6Underdosing of local antifungal, anti-infective and anti-inflammatory drugs
- T49.0XPoisoning by, adverse effect of and underdosing of local antifungal, anti-infective and anti-inflammatory drugs
- T49.1Poisoning by, adverse effect of and underdosing of antipruritics
- T49.2Poisoning by, adverse effect of and underdosing of local astringents and local detergents
- T49.2XPoisoning by, adverse effect of and underdosing of local astringents and local detergents
- T49.2X1Poisoning by local astringents and local detergents, accidental (unintentional)
- T49.2X2Poisoning by local astringents and local detergents, intentional self-harm
- T49.2X3Poisoning by local astringents and local detergents, assault
- T49.2X4Poisoning by local astringents and local detergents, undetermined
- T49.2X5Adverse effect of local astringents and local detergents
- T49.2X6Underdosing of local astringents and local detergents
- T49.2XPoisoning by, adverse effect of and underdosing of local astringents and local detergents
- T49.3Poisoning by, adverse effect of and underdosing of emollients, demulcents and protectants
- T49.3XPoisoning by, adverse effect of and underdosing of emollients, demulcents and protectants
- T49.3X1Poisoning by emollients, demulcents and protectants, accidental (unintentional)
- T49.3X2Poisoning by emollients, demulcents and protectants, intentional self-harm
- T49.3X3Poisoning by emollients, demulcents and protectants, assault
- T49.3X4Poisoning by emollients, demulcents and protectants, undetermined
- T49.3X5Adverse effect of emollients, demulcents and protectants
- T49.3X6Underdosing of emollients, demulcents and protectants
- T49.3XPoisoning by, adverse effect of and underdosing of emollients, demulcents and protectants
- T49.4Poisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations
- T49.4XPoisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations
- T49.4X1Poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, accidental (unintentional)
- T49.4X2Poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, intentional self-harm
- T49.4X3Poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, assault
- T49.4X4Poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, undetermined
- T49.4X5Adverse effect of keratolytics, keratoplastics, and other hair treatment drugs and preparations
- T49.4X6Underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations
- T49.4XPoisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations
- T49.5Poisoning by, adverse effect of and underdosing of ophthalmological drugs and preparations
- T49.5XPoisoning by, adverse effect of and underdosing of ophthalmological drugs and preparations
- T49.5X1Poisoning by ophthalmological drugs and preparations, accidental (unintentional)
- T49.5X2Poisoning by ophthalmological drugs and preparations, intentional self-harm
- T49.5X3Poisoning by ophthalmological drugs and preparations, assault
- T49.5X4Poisoning by ophthalmological drugs and preparations, undetermined
- T49.5X5Adverse effect of ophthalmological drugs and preparations
- T49.5X6Underdosing of ophthalmological drugs and preparations
- T49.5XPoisoning by, adverse effect of and underdosing of ophthalmological drugs and preparations
- T49.6Poisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparations
- T49.6XPoisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparations
- T49.6X1Poisoning by otorhinolaryngological drugs and preparations, accidental (unintentional)
- T49.6X2Poisoning by otorhinolaryngological drugs and preparations, intentional self-harm
- T49.6X3Poisoning by otorhinolaryngological drugs and preparations, assault
- T49.6X4Poisoning by otorhinolaryngological drugs and preparations, undetermined
- T49.6X5Adverse effect of otorhinolaryngological drugs and preparations
- T49.6X6Underdosing of otorhinolaryngological drugs and preparations
- T49.6XPoisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparations
- T49.7Poisoning by, adverse effect of and underdosing of dental drugs, topically applied
- T49.7XPoisoning by, adverse effect of and underdosing of dental drugs, topically applied
- T49.7X1Poisoning by dental drugs, topically applied, accidental (unintentional)
- T49.7X2Poisoning by dental drugs, topically applied, intentional self-harm
- T49.7X3Poisoning by dental drugs, topically applied, assault
- T49.7X4Poisoning by dental drugs, topically applied, undetermined
- T49.7X5Adverse effect of dental drugs, topically applied
- T49.7X6Underdosing of dental drugs, topically applied
- T49.7XPoisoning by, adverse effect of and underdosing of dental drugs, topically applied
- T49.8Poisoning by, adverse effect of and underdosing of other topical agents
- T49.8XPoisoning by, adverse effect of and underdosing of other topical agents
- T49.8X1Poisoning by other topical agents, accidental (unintentional)
- T49.8X2Poisoning by other topical agents, intentional self-harm
- T49.8X3Poisoning by other topical agents, assault
- T49.8X4Poisoning by other topical agents, undetermined
- T49.8X5Adverse effect of other topical agents
- T49.8X6Underdosing of other topical agents
- T49.8XPoisoning by, adverse effect of and underdosing of other topical agents
- T49.9Poisoning by, adverse effect of and underdosing of unspecified topical agent
- T49.91Poisoning by unspecified topical agent, accidental (unintentional)
- T49.92Poisoning by unspecified topical agent, intentional self-harm
- T49.93Poisoning by unspecified topical agent, assault
- T49.94Poisoning by unspecified topical agent, undetermined
- T49.95Adverse effect of unspecified topical agent
- T49.96Underdosing of unspecified topical agent
Coding notes
IncludesFurther defines the content of the category
- poisoning by, adverse effect of and underdosing of glucocorticoids, topically used
Notes that apply from higher levels
Instructions written at a parent level also apply to T49.
Codes whose notes reference T49
- T38.0Excludes1
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T49
Is T49 billable?
- No. T49 is a header code. Report one of its more specific subcodes instead.