S43.142A Inferior dislocation of left acromioclavicular joint, initial encounter

ICD-10-CM S43.142A: Inferior Dislocation of Left Acromioclavicular Joint, Initial Encounter

ICD-10-CM code S43.142A identifies an inferior dislocation of the left acromioclavicular joint, initial encounter. This active diagnosis concept is classified under the semantic type of injury or poisoning. The terminology record includes a parent code and a related sequela code. 1 3

Plain-language overview

This diagnosis code represents a specific joint injury where the left acromioclavicular joint is dislocated inferiorly, and it is designated for the initial encounter for this injury. 1

What this code represents

The code S43.142A is an active ICD-10-CM terminology concept with the preferred name of inferior dislocation of left acromioclavicular joint, initial encounter, and it carries the semantic type of injury or poisoning. 1

Within the ICD-10-CM hierarchy, this specific code is a narrower concept of the parent code S43.142, which is the inferior dislocation of the left acromioclavicular joint. 1

Coding details

The terminology record lists S43.142A for the initial encounter and S43.142S for the sequela of an inferior dislocation of the left acromioclavicular joint. 3

Published abbreviations for this diagnosis include inferior dislocation of left acromioclavicular joint, init, and it appears alongside other left acromioclavicular joint displacement codes. 4 5

Documentation considerations

Clinical documentation elements explicitly supported by the terminology record include the inferior dislocation of the left acromioclavicular joint and the initial encounter designation. 1

Clinical context

Literature on acromioclavicular joint dislocations notes that management remains controversial, with over sixty operative techniques described and a relatively high complication profile. 2

What the sources add

While the terminology sources define the diagnosis code, a clinical surgery article explains that acromioclavicular joint dislocation management is a difficult surgical problem involving various reconstruction techniques. 1 2

Coverage and utilization context

An orthopedic reference list includes this exact code among other shoulder and acromioclavicular joint dislocation diagnoses for left, right, and unspecified anatomical sides. 5

Sources

1. ICD-10-CM S43.142A terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Acromioclavicular joint dislocation: a novel surgical technique for acromioclavicular joint reduction with coracoclavicular ligament reconstruction and anatomic conoid ligament reconstruction — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
5. Shoulder ICD-10 Codes (FY2026) — Orthopedic Reference | ClinicFlow — clinicflowai.com; accessed 2026-07-27.