S32.121 Minimally displaced Zone II fracture of sacrum

ICD-10-CM S32.121: Minimally displaced Zone II fracture of sacrum

ICD-10-CM code S32.121 designates a minimally displaced Zone II fracture of the sacrum, categorized as an injury or poisoning concept. This active terminology record is a child of the broader Zone II sacral fracture category. Clinical literature establishes that sacral fractures are assessed for stability, displacement, and neurologic injury to determine appropriate care. 1 2

Plain-language overview

ICD-10-CM code S32.121 identifies a minimally displaced Zone II fracture of the sacrum, providing a standardized diagnostic label for this specific type of injury. 1

What this code represents

The diagnosis code S32.121 represents an injury or poisoning concept and functions as a narrower child concept under the parent code S32.12 for Zone II fractures of the sacrum. 1

The base code S32.121 does not contain narrower terminology concepts, and its official preferred name in the 2026 version is minimally displaced Zone II fracture of sacrum. 1

Clinical context

Clinical literature categorizes sacral fractures into three zones using the Denis classification, and clinical stability is determined by factors including displacement, instability, and neurologic injury. 2

A displacement greater than 10 mm indicates surgical treatment for sacral fractures, while non-displaced isolated transverse fractures or fractures below the sacroiliac joint level are considered stable. 2

Coding details

The more specific code S32.121A captures the initial encounter for a closed fracture and is identified as a billable diagnosis code within the ICD-10-CM system. 4

Documentation considerations

Coders report S32.121A only when provider documentation supports the specific condition described, as more specific codes within the same hierarchy can capture additional clinical detail. 4

Coverage and utilization context

Under the CMS-HCC V28 risk adjustment model, S32.121A maps to Vertebral Fractures without Spinal Cord Injury (HCC 401) with a community, non-dual, aged base RAF weight of 0.522. 4

What the sources add

While the official terminology record defines the diagnostic label and hierarchy for S32.121, clinical literature adds operational context regarding how displacement and instability determine the need for operative treatment. 1 2

Sources

1. ICD-10-CM S32.121 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Sacral fractures: issues, challenges, solutions — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
4. 2026 ICD-10-CM S32.121A: Minimally displaced Zone | HCC 401 — hccbuddy.com; accessed 2026-07-27.