M84.332S Stress fracture, left ulna, sequela

ICD-10-CM M84.332S: Stress fracture, left ulna, sequela

ICD-10-CM code M84.332S designates a sequela of a stress fracture in the left ulna. The code is an active terminology concept with a parent code for a left ulna stress fracture. It is distinct from subsequent encounter codes for delayed healing or malunion. The available sources establish terminology and code structure but omit specific clinical guidance for this exact diagnosis. 1 3 4

Plain-language overview

The diagnostic label for M84.332S is a stress fracture of the left ulna sequela, representing a condition currently active within the ICD-10-CM version 2026 terminology system. 1

What this code represents

Code M84.332S functions as a pathologic function concept that falls beneath the parent concept M84.332, which designates a stress fracture of the left ulna without specifying an encounter. 1

The M84.332S code is distinct from M84.332G and M84.332P, which designate subsequent encounters for a left ulna stress fracture with delayed healing or malunion respectively. 3 4

Coding details

The official abbreviation for M84.332S matches its preferred name exactly, confirming the terminology record identifies the condition as a stress fracture, left ulna, sequela. 1

The terminology record for M84.332S indicates the concept has narrower concepts within the ICD-10-CM hierarchy, establishing it as a broader category rather than a strictly terminal node. 1

Documentation considerations

Available sources list M84.332S alongside M84.332G for delayed healing and M84.332P for malunion, providing distinct codes to differentiate a sequela from subsequent fracture encounters. 3 4

Clinical context

Distal ulnar fractures are prevalent upper extremity injuries frequently encountered in emergency departments, with management often involving surgical correction of the radius first. 2

What the sources add

While terminology records provide the exact hierarchical definition for M84.332S, the clinical source provides general emergency department context for ulnar fractures without defining this specific stress fracture sequela code. 1 2

Coverage and utilization context

A third-party code list includes M84.332S and provides its official description as a stress fracture, left ulna, sequela, functioning as a non-authoritative reference for code lookup. 4

Sources

1. ICD-10-CM M84.332S terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
4. MedicareDrop — medicaredrop.com; accessed 2026-07-27.