T66-T78

Non-Billable

ChapterS00–T88

Rankblock

Official Description

Other and unspecified effects of external causes (T66-T78)

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Non-billable category (requires more specific sub-code).
•Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

Excludes2(Not included here)

Use Additional Code

Code Also

, if applicable, place of occurrence, such as:
highway rest stop (Y92.523)
school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
service areas as the place of occurrence of the external cause (Y92.52-)
single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
transport vehicle as the place of occurrence of the external cause (Y92.81-)

CH19Injury, poisoning and certain other consequences of external causes (S00-T88)

T66-T78Other and unspecified effects of external causes (T66-T78)

T66Radiation sickness, unspecified

T67Effects of heat and light

T68Hypothermia

T69Other effects of reduced temperature

T70Effects of air pressure and water pressure

T71Asphyxiation

T73Effects of other deprivation

T74Adult and child abuse, neglect and other maltreatment, confirmed

T75Other and unspecified effects of other external causes

T76Adult and child abuse, neglect and other maltreatment, suspected

T78Adverse effects, not elsewhere classified

The following parent sections contain instructions or notes that apply to T66-T78:

chapterCH19

Injury, poisoning and certain other consequences of external causes (S00-T88)

2026

No direct MS-DRG triggers identified.

Find surgical and procedural codes related to Other and unspecified effects of external causes (T66-T78).