contusion is a traumatic closed injury of tissue or an organ resulting from blunt mechanical force that ruptures capillary networks and postcapillary venules without disrupting skin or mucosal epithelial continuity. It is distinguished from open lacerations or abrasions where surface integrity is broken, and from spontaneous purpura or hematomas which develop without mechanical trauma. Pathophysiologically, the blunt compression creates a sudden transient shear pressure on vascular walls, triggering immediate extravasation of erythrocytes, leukocytes, and plasma into the interstitium, accompanied by histamine release, neurogenic inflammation, and localized microvascular thrombosis. Physiological repair progresses through erythrocyte extravasation, enzymatic hemoglobin breakdown (from purple-blue deoxyhemoglobin to green biliverdin, yellow bilirubin, and golden-brown hemosiderin), and clearance by tissue macrophages. Clinical subtypes range from superficial cutaneous contusions such as S00.03XA to severe visceral forms such as pulmonary contusion S27.321A and cerebral contusion S06.310A. Superficial contusions are frequently misidentified as full-thickness hematomas or superficial abrasions when minor epidermal micro-shearing is present alongside vascular extravasation.
Denotes action, condition, or the resulting state of a process
The word entered English in the 1400s as contusion (noun), borrowed from Middle French contusion from Classical Latin contΕ«siΕnem, the nominal form of contundere β literally βthe state or act of thorough crushing or striking.β The root connects to related terms: contund (to beat or pound thoroughly), obtuse (literally blunted by beating, from ob- against + tundere), and contusiform (resembling a bruise or blunt lesion).
Manual therapy techniques (e.g., mobilization/manipulation, manual lymphatic drainage, manual traction), 1 or more regions, each 15 minutes
β οΈ Coding Note: In ICD-10-CM chapter 19, contusions are classified by specific anatomic location, laterality, and a mandatory 7th character identifying the episode of care: A for initial encounter, D for subsequent encounter, or S for sequela. When an internal organ or visceral contusion occurs simultaneously with a superficial contusion of the same body region (for example, a lung contusion classified as S27.321A with an overlying thoracic wall contusion classified as S20.20XA), coding guidelines mandate sequencing the internal, more severe injury first, and omitting the superficial contusion when ICD-10-CM instructional notes specify βexcludes superficial injury of chest wall.β For physician profee services, procedural drainage of secondary collections resulting from severe contusions must be documented as distinct from routine superficial care, employing modifier -25 on evaluative codes or site modifiers such as -RT and -LT where applicable.