S82.844B Nondisplaced bimalleolar fracture of right lower leg, initial encounter for open fracture type I or II

ICD-10-CM S82.844B: Nondisplaced bimalleolar fracture of right lower leg, initial encounter for open fracture type I or II

ICD-10-CM code S82.844B identifies a nondisplaced bimalleolar fracture of the right lower leg during an initial encounter for an open fracture type I or II. The terminology is active and classified as an injury or poisoning concept. General clinical literature notes that bi- or trimalleolar fractures are common bone injuries with a rising incidence. 1 2

Plain-language overview

This code describes a specific right lower leg injury involving a nondisplaced bimalleolar fracture, documented during the initial encounter for an open fracture type I or II. 1

What this code represents

The code S82.844B is an active ICD-10-CM terminology concept with a semantic type of injury or poisoning, and it has narrower concepts within the terminology. 1

The parent concept for S82.844B is S82.844, which is the nondisplaced bimalleolar fracture of the right lower leg without the encounter or open fracture specificity. 1

Coding details

Terminology records list S82.844B alongside S82.844C, which is another distinct code for a nondisplaced bimalleolar fracture of the right lower leg within the same coding hierarchy. 3

The published abbreviation for this diagnosis is nondisp bimalleol fx r low leg, init for opn fx type I/2, providing a shortened terminology representation. 1

Documentation considerations

Clinical literature indicates that an open ankle fracture is an independent risk factor for wound complications, establishing the clinical severity relevant to documenting open fracture types. 2

Coverage and utilization context

A Medicare policy article for knee orthoses includes the exact diagnosis label for a nondisplaced bimalleolar fracture of the right lower leg, initial encounter, within its listed text. 4

A Medicare billing and coding article for tetanus immunization lists a displaced bimalleolar fracture of the right lower leg, initial encounter for open fracture type I or II, within its text. 5

What the sources add

While terminology records define the exact code label and hierarchy, clinical literature adds that bi- or trimalleolar fractures have an annual incidence of 33 per 100,000 person-years in Sweden. 1 2

Sources

1. ICD-10-CM S82.844B terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Current management of trimalleolar ankle fractures — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
4. Article - Knee Orthoses - Policy Article (A52465) — cms.gov; accessed 2026-07-27.
5. Article - Billing and Coding: Tetanus Immunization (A58872) — cms.gov; accessed 2026-07-27.
6. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.