All ICD10 Codes

T66-T78

Non-Billable
ChapterS00–T88
Rankblock
Official Description

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

Use a more specific code (2 billable, 9 non-billable)
T66Radiation sickness, unspecifiedT67Effects of heat and lighthas subcodesT68HypothermiaT69Other effects of reduced temperaturehas subcodesT70Effects of air pressure and water pressurehas subcodesT71Asphyxiationhas subcodesT73Effects of other deprivationhas subcodesT74Adult and child abuse, neglect and other maltreatment, confirmedhas subcodesT75Other and unspecified effects of other external causeshas subcodesT76Adult and child abuse, neglect and other maltreatment, suspectedhas subcodesT78Adverse effects, not elsewhere classifiedhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

CH19 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
Use Additional Code
  • code to identify any retained foreign body, if applicable (Z18.-)

Instructional Notes

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-)

Clinical Hierarchy

BillableHas subcodes
CH19Injury, poisoning and certain other consequences of external causes (S00-T88)
T66-T78Other and unspecified effects of external causes (T66-T78)Not billable
T66Radiation sickness, unspecifiedBillable
T67Effects of heat and lightSubcodes
T68HypothermiaBillable
T69Other effects of reduced temperatureSubcodes
T70Effects of air pressure and water pressureSubcodes
T71AsphyxiationSubcodes
T73Effects of other deprivationSubcodes
T74Adult and child abuse, neglect and other maltreatment, confirmedSubcodes
T75Other and unspecified effects of other external causesSubcodes
T76Adult and child abuse, neglect and other maltreatment, suspectedSubcodes
T78Adverse effects, not elsewhere classifiedSubcodes

Applicable Ancestor Context

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)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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