S79.102A Unspecified physeal fracture of lower end of left femur, initial encounter for closed fracture

ICD-10-CM S79.102A: Unspecified Physeal Fracture of Lower End of Left Femur, Initial Encounter for Closed Fracture

ICD-10-CM code S79.102A identifies an unspecified physeal fracture of the lower end of the left femur during an initial encounter for a closed fracture. The concept is classified as an injury or poisoning, and its parent code denotes an unspecified physeal fracture of the same anatomical region. 1

Plain-language overview

This diagnosis code represents an injury to the lower end of the left femur, documented during the initial encounter for a closed fracture, and is classified under the semantic type of injury or poisoning. 1

What this code represents

The terminology record assigns the semantic type of injury or poisoning to S79.102A and lists its parent concept as S79.102, an unspecified physeal fracture of the lower end of the left femur. 1

Coding details

The code S79.102A is an active concept in the ICD-10-CM version 2026 terminology and possesses narrower concepts within the same terminology hierarchy. 1

A published abbreviation for this diagnosis is unsp physeal fracture of the lower end of the left femur, init, matching the initial encounter for a closed fracture. 1

Documentation considerations

The terminology record specifies the code components as an unspecified physeal fracture of the lower end of the left femur and an initial encounter for a closed fracture. 1

Coverage and utilization context

A Medicare billing and coding article for total knee arthroplasty includes S79.102A in a list of related diagnosis codes alongside S79.102D, another unspecified physeal fracture of the lower end. 3

What the sources add

While the terminology record defines the code structure, a clinical reference describes distal femur fracture treatments like retrograde nailing and complications such as infection for closed fractures. 1 2

A pediatric fracture management reference discusses physeal fractures of the lower limb and premature physeal closure, whereas the S79.102A terminology record provides no clinical treatment guidance. 4 1

Sources

1. ICD-10-CM S79.102A terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Total Knee Arthroplasty (A57686) — cms.gov; accessed 2026-07-27.
4. Pediatric Femur Fractures Treatment & Management — emedicine.medscape.com; accessed 2026-07-27.