S83.001A Unspecified subluxation of right patella, initial encounter

ICD-10-CM S83.001A: Unspecified subluxation of right patella, initial encounter

ICD-10-CM code S83.001A identifies an unspecified subluxation of the right patella during an initial encounter. The terminology record is active and classifies this concept under the semantic type of injury or poisoning. It exists as a narrower concept beneath the parent code for unspecified right patellar subluxation. 1 2

Plain-language overview

This diagnosis code represents an unspecified subluxation of the right patella during an initial encounter, serving as an active terminology record for this specific injury concept. 1

What this code represents

The official display label for S83.001A is unspecified subluxation of the right patella, initial encounter, and the terminology record assigns it a semantic type of injury or poisoning. 1 2

Code S83.001A is a narrower concept under the parent code S83.001, which is the unspecified subluxation of the right patella, and the record status for this specific code is active. 1

Coding details

The code S83.001A is listed alongside S83.001D, which designates a subsequent encounter for an unspecified subluxation of the right patella, distinguishing the encounter type. 3

Distinct codes exist for laterality and specificity, such as S83.002A for the left patella and S83.011A for lateral subluxation of the right patella, both for initial encounters. 3

Documentation considerations

Clinical reference lists place S83.001A among related patellar injury variants, including distinct codes for left patella subluxation and right patella dislocation during initial encounters. 3 4

The code S83.001A appears in clinical listings alongside more specific right patella subluxation variants, including lateral subluxation and other subluxation codes for initial encounters. 3

What the sources add

While official terminology sources define the code's label and semantic type, clinical reference lists provide operational context by showing the code alongside related knee injury variations. 1 3 4

Both official terminology records and external clinical code lists confirm the exact phrasing of unspecified subluxation of right patella, initial encounter for this specific identifier. 1 4

Sources

1. ICD-10-CM S83.001A terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
3. ICD-10-CM 2024 | S83.0 - Subluxation and dislocation of patella — unboundmedicine.com; accessed 2026-07-27.
4. Knee ICD-10 Codes (FY2026) — Orthopedic Reference | ClinicFlow — clinicflowai.com; accessed 2026-07-27.