T49.9
Poisoning by, adverse effect of and underdosing of unspecified topical agent
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 9 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 2 never code together
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 4
T49code
Includes
- poisoning by, adverse effect of and underdosing of glucocorticoids, topically used
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 9 same parent — T49
T49.0 Local antifungal, anti-infective and anti-inflammatory drugs category T49.1 Antipruritics category T49.2 Local astringents and local detergents category T49.3 Emollients, demulcents and protectants category T49.4 Keratolyt/keratplst/hair trmt drug category T49.5 Ophthalmological drugs and preparations category T49.6 Otorhinolaryngological drugs and preparations category T49.7 Dental drugs, topically applied category T49.8 Topical agents category
Subordinate codes 6
T49.91 Poisoning by unsp topical agent, accidental (unintentional) T49.92 Poisoning by unsp topical agent, intentional self-harm T49.93 Poisoning by unspecified topical agent, assault T49.94 Poisoning by unspecified topical agent, undetermined T49.95 Adverse effect of unspecified topical agent T49.96 Underdosing of unspecified topical agent
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.