Alphabetic Index FY2027

T31

Burns classified according to extent of body surface involved

FY2027Chapter 19: Injury, poisoning and certain other consequences of external causes/T30–T32 Burns and corrosions of multiple and unspecified body regions

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

T31 is a non-billable ICD-10-CM code category for burns classified according to extent of body surface involved. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are T31.0 Burns involving less than 10% of body surface, T31.1 Burns involving 10-19% of body surface, T31.2 Burns involving 20-29% of body surface, T31.3 Burns involving 30-39% of body surface and 6 more. Its coding notes include a Use additional code instruction and 2 Excludes2 entries.

Guidelines tips

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

The 7th character depends on whether the patient is in active treatment, not on who sees the patient. An aftercare Z code is not used for injury aftercare.

Guidelines I.C.19.aInjuries: application of 7th charactersRead the official text

T31 and T32 are used for acute burns when the site is not specified or additional data is needed, and not for sequelae.

Guidelines I.C.19.d.6Burns by extent of body surface (T31, T32)Read the official text

Use additional code

Add the listed code as a secondary code, if known.

Also from chapter/block level (1 note)
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • code to identify any retained foreign body, if applicable (Z18.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (2 notes)
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

Notes

This code
  • This category is to be used as the primary code only when the site of the burn is unspecified. It should be used as a supplementary code with categories T20-T25 when the site is specified.
Also from chapter/block level (2 notes)
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • 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.

More specific codes under T31 10