S53.112A Anterior subluxation of left ulnohumeral joint, initial encounter

ICD-10-CM S53.112A: Anterior subluxation of left ulnohumeral joint, initial encounter

ICD-10-CM code S53.112A identifies an anterior subluxation of the left ulnohumeral joint during an initial encounter. The ulnohumeral joint is a highly congruent part of the elbow that permits hinge-like motion. This terminology record is active and classifies the concept as an injury or poisoning. 1 2

Plain-language overview

The ulnohumeral joint is a highly congruent component of the elbow that functions as a hinge to allow motion in the sagittal plane, providing inherent stability to the joint structure. 2

What this code represents

Code S53.112A is an active ICD-10-CM terminology record representing the diagnosis of an anterior subluxation of the left ulnohumeral joint for an initial encounter. 1

The terminology record assigns this specific diagnosis code a semantic type of Injury or Poisoning, and it notes that the concept has narrower concepts within the ICD-10-CM terminology. 1

Coding details

Within the ICD-10-CM code tree, S53.112A is distinct from S53.112D, which represents a subsequent encounter for the same anterior subluxation of the left ulnohumeral joint. 3

The code S53.112A is listed alongside other left elbow initial encounter subluxation variants, including S53.132A for medial subluxation and S53.122A for posterior subluxation of the left ulnohumeral joint. 3

Documentation considerations

The parent concept for this specific diagnosis is S53.112, which establishes the broader category of anterior subluxation of the left ulnohumeral joint before specifying the initial encounter. 1

Clinical documentation for ulnohumeral joint subluxation may involve evaluating related elbow structures, as the lateral collateral ligament provides support to the ulnohumeral joint against specific stress. 2

What the sources add

While the terminology record provides the official code definition and hierarchical status, the clinical source adds operational context by explaining the anatomical stability and biomechanics of the ulnohumeral joint. 1 2

The code tree listing distinguishes S53.112A from unspecified left ulnohumeral joint subluxation codes like S53.102A, whereas the terminology record confirms its active status and published abbreviation. 1 3

Sources

1. ICD-10-CM S53.112A terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Improved Understanding of Traumatic Complex Elbow Instability — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. ICD-10-CM 2024 | S53 - Dislocation and sprain of joints and ligaments of elbow — unboundmedicine.com; accessed 2026-07-27.