FY2027 ICD-10-CM reference
T32.9: Corrosions involving 90% or more of body surface
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Corrosions involving 90% or more of body surface. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- T32.90: Corrosions involving 90% or more of body surface with 0% to 9% third degree corrosionBillable code
- T32.91: Corrosions involving 90% or more of body surface with 10-19% third degree corrosionBillable code
- T32.92: Corrosions involving 90% or more of body surface with 20-29% third degree corrosionBillable code
- T32.93: Corrosions involving 90% or more of body surface with 30-39% third degree corrosionBillable code
- T32.94: Corrosions involving 90% or more of body surface with 40-49% third degree corrosionBillable code
- T32.95: Corrosions involving 90% or more of body surface with 50-59% third degree corrosionBillable code
- T32.96: Corrosions involving 90% or more of body surface with 60-69% third degree corrosionBillable code
- T32.97: Corrosions involving 90% or more of body surface with 70-79% third degree corrosionBillable code
- T32.98: Corrosions involving 90% or more of body surface with 80-89% third degree corrosionBillable code
- T32.99: Corrosions involving 90% or more of body surface with 90% or more third degree corrosionBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
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
Source: S00-T88 (chapter, inherited).
Instructional note
code to identify any retained foreign body, if applicable (Z18.-)
Source: S00-T88 (chapter, inherited).
Excludes2
birth trauma (P10-P15)
Source: S00-T88 (chapter, inherited).
Excludes2
obstetric trauma (O70-O71)
Source: S00-T88 (chapter, inherited).
Instructional note
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.
Source: S00-T88 (chapter, inherited).
Instructional note
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.
Source: T32 (category, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does T32.9 mean in FY2027?
The official ICD-10-CM descriptor is Corrosions involving 90% or more of body surface. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is T32.9 billable in FY2027?
The FY2027 order file marks T32.9 as a nonbillable heading. Select a complete billable child code.
Does T32.9 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition