What is ICD-10 code T32.88?

T32.88 is the ICD-10-CM diagnosis code for Corrosions involving 80-89% of body surface with 80-89% third degree corrosion. Severe chemical burn covering 80-89% of the body with the deepest burns affecting 80-89% of that area. This represents near-total deep tissue destruction with minimal viable skin remaining. T32.88 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. T32.88 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. T32.88 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. T32.88 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does T32.88 map to under V28?

T32.88 maps to CMS-HCC V28 HCC 385 (Severe Skin Burn or Condition). The category numbers, labels, and conditions come from the CMS-HCC V28 model file for payment year 2026.

What documentation supports T32.88?

This code indicates the most severe extent within the 80-89% body surface category; verify documentation supports this level of severity Include seventh character extension and coordinate with codes for specific body regions affected and any inhalation injury Because T32.88 maps to an HCC category, the documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) before the diagnosis is used for risk adjustment. See the MEAT criteria checklist at /meat-criteria for what Monitor, Evaluate, Assess, or Treat looks like in a note. MEAT is generic documentation evidence, not a payer-specific rule.

2026 ICD-10-CM T32.88: Corrosions involving 80-89%

T32.88 maps to CMS-HCC V28 385. A source-labeled RAF reference is available. Documentation must support MEAT. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupT32.88Effective 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)

T32.88

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

Corrosions involving 80-89% of body surface with 80-89% third degree corrosion

Severe chemical burn covering 80-89% of the body with the deepest burns affecting 80-89% of that area. This represents near-total deep tissue destruction with minimal viable skin remaining.

Buddy Insight

CMS-HCC V28

Mapped

HCC 385

Severe Skin Burn or Condition

Code-level coefficient reference

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

T32.8Corrosions involving 80-89% of body surface

T32.88Corrosions involving 80-89% of body surface with 80-89% third degree corrosion

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for T32.88 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for T32.88 in this effective period.

Related Child Codes

Official

T32.80Corrosions involving 80-89% of body surface with 0% to 9% third degree corrosion

T32.81Corrosions involving 80-89% of body surface with 10-19% third degree corrosion

T32.82Corrosions involving 80-89% of body surface with 20-29% third degree corrosion

T32.83Corrosions involving 80-89% of body surface with 30-39% third degree corrosion

T32.84Corrosions involving 80-89% of body surface with 40-49% third degree corrosion

Includes

Official

ICD-10-CM does not list Includes notes for T32.88 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for T32.88 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for T32.88 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for T32.88 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for T32.88 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Body surface area documentation (80-89%)

Third-degree burn extent (80-89%)

Chemical agent and concentration details

Exposure timeline and emergency response

MEAT Support

HCC Buddy guidance

Body surface area documentation (80-89%)

Third-degree burn extent (80-89%)

Chemical agent and concentration details

Exposure timeline and emergency response

Audit Caution

HCC Buddy guidance

Misinterpreting the matched percentage requirements

Coding burns when chemical exposure documented

Inadequate external cause code documentation

Errors in assessing near-total destruction

Common Mistakes

HCC Buddy guidance

T32.87 — Has 70-79% third-degree involvement instead of 80-89%

T32.99 — Has 90%+ third-degree involvement instead of 80-89%

T32.78 — Involves 70-79% total BSA instead of 80-89%

T31.88 — Thermal burns, not chemical corrosions

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 T32.88 an HCC code?

Yes. T32.88 (Corrosions involving 80-89% of body surface with 80-89% 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: T32.88 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: T32.88
Description: Corrosions involving 80-89% of body surface with 80-89% 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 T32.88 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT Criteria for T32.88

For T32.88 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

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

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed T32.88 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

T32.88 is the ICD-10-CM diagnosis code for corrosions involving 80-89% of body surface with 80-89% third degree corrosion. Severe chemical burn covering 80-89% of the body with the deepest burns affecting 80-89% of that area. This represents near-total deep tissue destruction with minimal viable skin remaining. T32.88 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, T32.88 maps to Severe Skin Burn or Condition (HCC 385) with a source-labeled community, non-dual, aged reference coefficient of 1.291. No V24 mapping is shown for T32.88; use the applicable model and payment year when reviewing the V28 mapping. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. 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 code indicates the most severe extent within the 80-89% body surface category; verify documentation supports this level of severity. Because T32.88 maps to an HCC category, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) before the diagnosis is used for risk adjustment. 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 T32.88 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This code indicates the most severe extent within the 80-89% body surface category; verify documentation supports this level of severity
•Include seventh character extension and coordinate with codes for specific body regions affected and any inhalation injury

Clinical Significance

This indicates near-total chemical burns affecting 80-89% of the body where almost all affected area has full-thickness destruction (80-89% third-degree), representing catastrophic injury with exceptional mortality risk. These patients require immediate specialized burn care with extensive reconstruction and face critical prognosis with minimal viable skin remaining.