T32.21

Billable

Corrosions involving 20-29% of body surface with 10-19% third degree corrosion

HCC Category Mapping

V28HCC 385 — Severe Skin Burn or Condition

0.350

V24HCC 162 — Severe Skin Burn or Condition

0.517

ESRDHCC 162 — Severe Skin Burn or Condition

0.000

What This Code Means

Chemical burn affecting 20-29% of the body surface with moderate deep tissue damage (10-19% third degree burns).

Coding Tips

•Burns of this extent typically require hospitalization and specialized burn care
•Coordinate coding with documentation of fluid resuscitation needs and burn center consultation

Clinical Significance

Corrosions involving 20-29% of body surface area with 10-19% third-degree involvement represent major chemical burn injury requiring immediate specialized intervention and ongoing monitoring for systemic toxicity. Chemical burns can continue progressing for hours after initial exposure, making aggressive decontamination, neutralization protocols, and continuous assessment critical for optimal outcomes.

Documentation Requirements

✓Documentation of 20-29% total body surface area chemical involvement
✓Clear documentation that 10-19% of affected area has third-degree corrosion
✓Identification and documentation of the causative chemical agent
✓Detailed documentation of decontamination and neutralization procedures
✓Assessment of chemical burn progression and ongoing tissue damage
✓Evidence of specialized chemical burn treatment protocols
✓Monitoring for systemic toxicity and chemical-specific complications
✓Documentation of multidisciplinary care including toxicology consultation

Commonly Confused Codes

T31.21 — Thermal burns 20-29% TBSA with 10-19% third degree (thermal, not chemical)T32.20 — Corrosions 20-29% TBSA with no third degree involvement T32.22 — Corrosions 20-29% TBSA with 20-29% third degree (more third-degree)T32.11 — Corrosions 10-19% TBSA with 10-19% third degree (smaller total area)T32.31 — Corrosions 30-39% TBSA with 10-19% third degree (larger total area)

Code Hierarchy

└T32Corrosions classified according to extent of body surface involved └T32.2Corrosions involving 20-29% of body surface └T32.21Corrosions involving 20-29% of body surface with 10-19% third degree corrosion

└T32.21Corrosions involving 20-29% of body surface with 10-19% third degree corrosion