S42.391D Other fracture of shaft of right humerus, subsequent encounter for fracture with routine healing

ICD-10-CM Code S42.391D: Other fracture of shaft of right humerus, subsequent encounter for routine healing

ICD-10-CM code S42.391D represents an other fracture of the shaft of the right humerus during a subsequent encounter for fracture with routine healing. The supplied sources establish this specific diagnosis code and its semantic type, while clinical literature provides general management context for humeral shaft fractures, including surgical and non-surgical treatment comparisons. 3 4 2

Plain-language overview

Code S42.391D identifies a subsequent encounter for an other fracture of the shaft of the right humerus with routine healing, and the concept is classified under the semantic type of injury or poisoning. 3 4

What this code represents

The code S42.391D is listed alongside S42.392D, which designates an other fracture of the shaft of the left humerus for a subsequent encounter with routine healing, establishing a laterality distinction within this coding category. 4

The same right humerus code category includes S42.391G, which designates a subsequent encounter for an other fracture of the shaft of the right humerus with delayed healing, contrasting with the routine healing indicated by S42.391D. 4

Clinical context

Clinical literature notes that a main challenge with humeral shaft fractures is the choice between surgical and non-surgical treatment, and a trial compares patient-reported outcomes after these treatments for acute humeral shaft fractures. 2

Management approaches for humeral shaft fractures include functional bracing, and one retrospective study compared custom-made thermoplastic braces with premade commercial braces for functional bracing of midshaft humerus fractures. 5

Documentation considerations

The code S42.391D explicitly specifies the right humerus, a subsequent encounter, and routine healing, distinguishing it from codes for unspecified arms or delayed healing within the same category. 4

What the sources add

The EVS Explore source provides the semantic type classification of injury or poisoning for S42.391D, while the Unbound Medicine source provides the broader code tree context showing related right, left, and unspecified humerus fracture codes. 3 4

Clinical sources discuss general humeral shaft fracture treatments, including minimally invasive plating and intramedullary nailing, but these articles do not provide code-specific billing or coverage rules for S42.391D. 1 5

Sources

1. Humerus shaft fractures, approaches and management — pmc.ncbi.nlm.nih.gov; accessed 2026-07-26.
2. Surgical versus non-surgical treatment of humeral SHAFT fractures compared by a patient-reported outcome: the Scandinavian Humeral diAphyseal Fracture Trial (SHAFT)—a study protocol for a pragmatic randomized controlled trial — pmc.ncbi.nlm.nih.gov; accessed 2026-07-26.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-26.
4. ICD-10-CM 2024 | S42.3 - Fracture of shaft of humerus — unboundmedicine.com; accessed 2026-07-26.
5. Midshaft Humerus Fractures Treatment & Management — emedicine.medscape.com; accessed 2026-07-26.
6. Humeral Shaft Fracture – Non-Operative — twincitiesshoulderandelbow.com; accessed 2026-07-26.