S21.92XD Laceration with foreign body of unspecified part of thorax, subsequent encounter

ICD-10-CM S21.92XD: Laceration with foreign body of unspecified part of thorax, subsequent encounter

ICD-10-CM code S21.92XD identifies a laceration with a foreign body of an unspecified part of the thorax during a subsequent encounter. The code is listed among thorax injury classifications that distinguish between encounters with and without foreign bodies. Trauma to the thorax can involve serious clinical findings, and payer billing documentation may reference specific thoracic foreign body scenarios. 4 5 2 3

Plain-language overview

The code S21.92XD corresponds to the diagnosis label laceration with foreign body of unspecified part of thorax, subsequent encounter. The source establishes this exact terminology for the code, but does not explicitly define the clinical meaning of a subsequent encounter. 4

What this code represents

The code S21.92XD is grouped in a coding tree that includes S21.92XA for the initial encounter and S21.92XS for sequela of a laceration with foreign body of unspecified part of thorax. The source lists these codes but does not explicitly state that the seventh character D specifies a subsequent encounter. 5

Coding details

The coding tree distinguishes S21.92XD from S21.91XD, which represents a laceration without a foreign body of the unspecified part of the thorax. This distinction indicates that the presence of a foreign body is the differentiating factor between these specific thorax injury codes. 5

Clinical context

Trauma to the thoracic region can lead to life-threatening conditions such as pneumothorax, hemothorax, pulmonary contusions, rib fractures, cardiac tamponade, and diaphragmatic rupture. These clinical findings are associated with thoracic injuries generally, rather than being explicitly linked to S21.92XD. 2

Documentation considerations

The provided coding source lists S21.92XD alongside related initial, subsequent, and sequela encounter codes. The source does not explicitly state the documentation elements needed for accurate coding of this condition. 5

Coverage and utilization context

A Centers for Medicare & Medicaid Services wound care billing article includes a clinical scenario mentioning a foreign body of the right back wall of the thorax with penetration into the thoracic cavity. The source does not explicitly state that this demonstrates the appearance of thoracic foreign body injuries within payer billing documentation. 3

What the sources add

The National Center for Biotechnology Information provides clinical features of thoracic trauma, while the Centers for Medicare & Medicaid Services provides a billing context for thoracic foreign bodies. These sources add different clinical and operational perspectives to the coding classification listed by Unbound Medicine. 1 3 5

Questions to verify

Verification is needed regarding whether the seventh character D in S21.92XD explicitly specifies a subsequent encounter for the laceration. The provided coding tree lists the code with this label but does not explicitly define the function of the seventh character. 5

Sources

1. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-25.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-25.
3. Article - Billing and Coding: Wound Care (A55909) — cms.gov; accessed 2026-07-25.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.
5. ICD-10-CM 2024 | S29 - Other and unspecified injuries of thorax — unboundmedicine.com; accessed 2026-07-25.