S53.21XS Traumatic rupture of right radial collateral ligament, sequela

ICD-10-CM Diagnosis Code S53.21XS: Traumatic Rupture of Right Radial Collateral Ligament, Sequela

ICD-10-CM code S53.21XS identifies a sequela of a traumatic rupture of the right radial collateral ligament. The terminology is active for the 2026 version and classifies the concept as an injury or poisoning. The radial collateral ligament is an elbow structure contributing to lateral joint stability. 1 2

Plain-language overview

Code S53.21XS is an active ICD-10-CM terminology concept representing a traumatic rupture of the right radial collateral ligament, sequela, and it belongs to the injury or poisoning semantic type. 1

What this code represents

The S53.21XS code is a narrower concept under the parent code S53.21 for traumatic rupture of the right radial collateral ligament, and it has an official published abbreviation for the sequela condition. 1

Clinical context

The radial collateral ligament originates on the humeral lateral epicondyle and inserts on the annular ligament, and it contributes to both varus and posterolateral stability of the elbow joint. 2

Disruptions of the lateral soft tissue restraints of the elbow, including the radial collateral ligament, are a recognized clinical entity that may result in chronic elbow instability. 2

Documentation considerations

The official terminology record for S53.21XS establishes the full diagnostic label as traumatic rupture of right radial collateral ligament, sequela, along with an active record status for the 2026 version. 1

Coverage and utilization context

The S53.21XS diagnosis code appears in a Medicare billing and coding article for nonvascular extremity ultrasound, listing the code alongside other traumatic elbow ligament rupture diagnoses. 3

What the sources add

While the terminology record defines the code's classification and active status, the Medicare article places S53.21XS into an operational billing context, and the clinical source details the ligament's anatomy. 1 2 3

The clinical source describes the radial collateral ligament as part of a complex including the annular and lateral ulnar collateral ligaments, whereas the terminology record strictly provides the code's naming hierarchy. 1 2

Sources

1. ICD-10-CM S53.21XS terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Nonoperative Management of Complete Lateral Elbow Ligamentous Disruption in an NFL Player: A Case Report — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Nonvascular Extremity Ultrasound (A56787) — cms.gov; accessed 2026-07-27.