ICD-10-CM Billable Code

T21.20

Burn of second degree of trunk, unspecified site

Clinical Classification Guidelines

Medical Intelligence & Overview

A second-degree burn, also known as a partial-thickness burn, affects both the outer layer of the skin (epidermis) and the underlying layer (dermis). When such burns occur on the trunk—that is, the main part of the body including the chest, abdomen, or back—they can be painful and require prompt medical attention. The ICD-10 code T21.20 specifically describes second-degree burns of the trunk at an unspecified site, highlighting that the exact location on the trunk is not specified but that the damage is of a second-degree nature.

Causes & Symptoms

Clinical Causes: Thermal or heat exposure from hot liquids, fires, or scorching objects Chemical burns caused by corrosive substances Electrical burns from contact with live wires or electrical devices Sunburns that are severe enough to reach second-degree depth Contact with hot surfaces such as hot metals or appliances

Key Symptoms: Red, blistered skin that may appear swollen Painful sensation in the affected area Moist, weeping skin with blister formation Sensitive to touch and often very tender Possible swelling and a shiny appearance of the skin Delayed healing if infection occurs or burn depth progresses

Diagnostic & Treatment

Diagnosis Path: Diagnosis of second-degree burns involves a physical examination by a healthcare professional who will assess the burn's appearance, depth, and extent. The clinician examines the skin for blistering, redness, edema, and pain response. Sometimes, additional tests or imaging are unnecessary unless deeper tissue injury or infections are suspected. Proper documentation of the burn’s location and severity is essential for determining treatment strategies. In some cases, a biopsy may be performed to rule out other skin conditions or to assess the severity more precisely.

Treatment Protocols: Management of second-degree trunk burns generally involves several key steps:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Clinical Advice & FAQs

Billing Guidance

Is T21.20 a billable ICD-10 code?
Yes, T21.20 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.

Documentation

How do I report T21.20?
Clinical documentation must specify the nature of Burn of second degree of trunk, unspecified site and any associated comorbidities for accurate reporting.

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