T32.54 maps to CMS-HCC V28 385. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC Buddy coding tools

ICD-10-CM Code View

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Code lookupT32.54

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Injury, poisoning and certain other consequences of external causes (S00-T88) / Burns and corrosions of multiple and unspecified body regions (T30-T32)

T32.54

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Corrosions involving 50-59% of body surface with 40-49% third degree corrosion

Chemical burn affecting 50-59% of the body surface, with the most severe burns (third degree) covering 40-49% of the affected area.

Buddy Insight

This represents even more severe chemical burns than T32.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

Mapped

HCC 385

Severe Skin Burn or Condition

Coefficient HCC 385: 1.291 (Community Non-Dual Aged (CNA))

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

Mapped

HCC 218

HHS-HCC 218 adult, RAF varies...

Code-level coefficient reference

ESRD/PACE

Mapped

HCC 162

Severe Skin Burn or Condition

Code-level coefficient reference

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

T32Corrosions classified according to extent of body surface involved T32.5Corrosions involving 50-59% of body surface T32.54Corrosions involving 50-59% of body surface with 40-49% third degree corrosion

Inclusion Terms

Official

No inclusion terms are included in this display for T32.54. Check the code and parent instructions in the Code Book.

Excludes 2

Official

birth trauma (P10-P15)Inherited from S00-T88
obstetric trauma (O70-O71)Inherited from S00-T88

Related Codes

Official

T32.50Corrosions involving 50-59% of body surface with 0% to 9% third degree corrosion T32.51Corrosions involving 50-59% of body surface with 10-19% third degree corrosion T32.52Corrosions involving 50-59% of body surface with 20-29% third degree corrosion T32.53Corrosions involving 50-59% of body surface with 30-39% third degree corrosion T32.55Corrosions involving 50-59% of body surface with 50-59% third degree corrosion

Includes

Official

No Includes notes are included in this display for T32.54. Check the code and parent instructions in the Code Book.

Excludes 1

Official

No Excludes 1 notes are included in this display for T32.54. Check the code and parent instructions in the Code Book.

Code First

Official

No Code First sequencing instructions are included in this display for T32.54. Check the code and parent instructions in the Code Book.

Use Additional

Official

code to identify any retained foreign body, if applicable (Z18.-)Inherited from S00-T88

Code Also

Official

No Code Also instructions are included in this display for T32.54. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Percentage of total body surface area affected (50-59%)

Percentage of third-degree burns (40-49%)

Type of corrosive agent and exposure details

Mechanism and timeline of injury occurrence

MEAT Support

HCC Buddy guidance

Percentage of total body surface area affected (50-59%)

Percentage of third-degree burns (40-49%)

Type of corrosive agent and exposure details

Mechanism and timeline of injury occurrence

Audit Caution

HCC Buddy guidance

Mixing up the two percentage requirements (total surface vs third-degree)

Using thermal burn codes (T31) instead of corrosion codes (T32)

Failing to include external cause code for the corrosive substance

Incorrectly sequencing when patient has both burns and corrosions

Common Mistakes

HCC Buddy guidance

T32.53 — Same body surface area but lower third-degree percentage (30-39%)

T32.55 — Same body surface area but higher third-degree percentage (50-59%)

T31.54 — Thermal burns with same percentages but different etiology

T32.44 — Lower total body surface involvement (40-49%) with same third-degree percentage

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is T32.54 an HCC code?

Yes. T32.54 (Corrosions involving 50-59% of body surface with 40-49% third degree corrosion) maps to HCC 385, Severe Skin Burn or Condition under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 1.291. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: T32.54 is billable and maps to V28 HCC 385, Severe Skin Burn or Condition. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: T32.54
Description: Corrosions involving 50-59% of body surface with 40-49% third degree corrosion
HCC (V28): HCC 385 — Severe Skin Burn or Condition
RAF reference coefficient: 1.291
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 385, Severe Skin Burn or Condition

1.291

ESRDHCC 162, Severe Skin Burn or Condition

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work T32.54 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for T32.54

For T32.54, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Coder workflow notes

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What This Code Means

T32.54 is the ICD-10-CM diagnosis code for corrosions involving 50-59% of body surface with 40-49% third degree corrosion. Chemical burn affecting 50-59% of the body surface, with the most severe burns (third degree) covering 40-49% of the affected area. T32.54 sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering burns and corrosions of multiple and unspecified body regions (t30-t32).

Under the CMS-HCC V28 risk adjustment model, T32.54 maps to Severe Skin Burn or Condition (HCC 385) with a source-labeled community, non-dual, aged reference coefficient of 1.291. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

This critical injury level indicates extensive full-thickness corrosion with high mortality and morbidity risk. For T32.54, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for T32.54 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This critical injury level indicates extensive full-thickness corrosion with high mortality and morbidity risk
•Ensure comprehensive documentation of all treatment interventions, complications, and multidisciplinary care coordination

Clinical Significance

This represents even more severe chemical burns than T32.53, with the same total body surface involvement but higher third-degree burn percentage, indicating greater tissue destruction and worse prognosis. Patients require immediate intensive care with aggressive fluid management, pain control, and early surgical intervention to prevent life-threatening complications.

Documentation Requirements

✓Percentage of total body surface area affected (50-59%)
✓Percentage of third-degree burns (40-49%)
✓Type of corrosive agent and exposure details
✓Mechanism and timeline of injury occurrence
✓Clinical assessment documenting burn depth and extent
✓Surgical interventions including escharotomy, debridement, or grafting
✓Complications such as sepsis, respiratory failure, or renal dysfunction
✓Rehabilitation status and functional outcomes

Commonly Confused Codes

•T32.53: Same body surface area but lower third-degree percentage (30-39%)
•T32.55: Same body surface area but higher third-degree percentage (50-59%)
•T31.54: Thermal burns with same percentages but different etiology
•T32.44: Lower total body surface involvement (40-49%) with same third-degree percentage
•T24.xxx: Site-specific corrosion codes rather than total body assessment