S92.345 Nondisplaced fracture of fourth metatarsal bone, left foot

ICD-10-CM S92.345: Nondisplaced fracture of fourth metatarsal bone, left foot

ICD-10-CM code S92.345 identifies a nondisplaced fracture of the fourth metatarsal bone in the left foot. The fourth metatarsal is one of the central metatarsal bones, and nondisplaced or minimally displaced fractures in this area are often managed nonoperatively. This code serves as a parent category for more specific encounter codes. 3 4 5 2

What this code represents

ICD-10-CM code S92.345 represents a nondisplaced fracture of the fourth metatarsal bone, left foot, and functions as a broader category that includes more specific encounter extensions such as S92.345S for sequela and S92.345G for delayed healing. 3 4 5

Plain-language overview

The fourth metatarsal is located among the central metatarsal bones of the foot, and fractures in this region can occur as stress fractures or acute traumatic fractures depending on the mechanism of injury. 2

Clinical context

Central metatarsals possess relative stability from surrounding soft-tissue attachments, and nondisplaced or minimally displaced fractures in these bones are often managed nonoperatively using immobilization and protected weight-bearing strategies. 2

Runners and military recruits most commonly sustain second through fourth metatarsal diaphyseal fractures, while metatarsal fractures overall account for a significant proportion of foot injuries. 1 2

Coding details

Code S92.345 is listed within the ICD-10-CM code tree alongside other specific fourth metatarsal fracture codes, including S92.344 for the right foot and S92.342 for a displaced fracture of the fourth metatarsal bone in the left foot. 5

Documentation considerations

The ICD-10-CM code tree lists specific encounter designations for S92.345, such as subsequent encounter for fracture with delayed healing and sequela, which are distinguished by their final characters. 5

What the sources add

The EVS Explore sources provide the official diagnostic label for S92.345 and its extensions, while the Unbound Medicine source adds operational context by placing the code within a broader hierarchical tree of metatarsal fracture variants. 3 4 5

The PMC clinical sources describe the general management and anatomical context of central metatarsal fractures, whereas the EVS Explore sources strictly define the ICD-10-CM diagnostic terminology for the fourth metatarsal bone. 2 3 4

Sources

1. Stress fractures of the foot - current evidence on management — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
2. Republication of “Metatarsal Fractures” — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.
5. ICD-10-CM 2024 | S92.3 - Fracture of metatarsal bone(s) — unboundmedicine.com; accessed 2026-07-25.