T32.0
Corrosions involving less than 10% of body surface
T32.0 (also written T320) is a billable ICD-10-CM diagnosis code for corrosions involving less than 10% of body surface. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 55 codes in category T32 (Corrosions classified according to extent of body surface involved). The Alphabetic Index lists it under 2 entries. 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.
T31 and T32 are used for acute burns when the site is not specified or additional data is needed, and not for sequelae.
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (1 note)
- 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)
- birth trauma (P10-P15)
- obstetric trauma (O70-O71)
Notes
- This category is to be used as the primary code only when the site of the corrosion is unspecified. It may be used as a supplementary code with categories T20-T25 when the site is specified.
Also from chapter/block level (2 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.
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 2 entries