T32.99 Corrosions involving 90% or more of body surface with 90% or more third degree corrosion

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applies from T32 Corrosions classified according to extent of body surface involved

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.

Risk adjustment (HCC)

• CMS-HCC V28: HCC 385 — Severe Skin Burn
• CMS-HCC V22: HCC 162 — Severe Skin Burn or Condition
• ESRD V24: HCC 162

MS-DRG index

Defines the logic of DRG(s) 927,933 in MDC 22.

Approximate ICD-9-CM (GEMs)

• 948.99 Burn [any degree] involving 90 percent or more of body surface with third degree burn, 90% or more of body surface (approximate)

Diagnosis Index entries for T32.99

• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › extent (percentage of body surface) › 90 percent or more (0-9 percent third degree) › with › 90-99 percent third degree
• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › unspecified site with extent of body surface involved specified › 90 percent or more (0-9 percent third degree) › with › 90-99 percent third degree

Nearby codes

• T32.94 Corrosions involving 90% or more of body surface with 40-49% third degree corrosion
• T32.95 Corrosions involving 90% or more of body surface with 50-59% third degree corrosion
• T32.96 Corrosions involving 90% or more of body surface with 60-69% third degree corrosion
• T32.97 Corrosions involving 90% or more of body surface with 70-79% third degree corrosion
• T32.98 Corrosions involving 90% or more of body surface with 80-89% third degree corrosion
• T32.99 Corrosions involving 90% or more of body surface with 90% or more third degree corrosion (this code)