S42.444 Nondisplaced fracture (avulsion) of medial epicondyle of right humerus

ICD-10-CM S42.444: Nondisplaced fracture (avulsion) of medial epicondyle of right humerus

ICD-10-CM code S42.444 identifies a nondisplaced avulsion fracture of the medial epicondyle of the right humerus. The terminology record classifies this concept as an injury or poisoning, situating it under the broader parent category for medial epicondyle humerus avulsion fractures. General clinical literature notes avulsion fractures involve bone pulled away by soft tissue forces. 1 2

Plain-language overview

An avulsion fracture occurs when tensile force through soft tissue pulls a piece of bone away, either from sudden acute stress or chronic repetitive stress, and may also result from surgical complications or pathologic conditions. 2

What this code represents

The official preferred name for S42.444 is nondisplaced fracture (avulsion) of medial epicondyle of right humerus, and the concept is classified under the semantic type of injury or poisoning. 1

S42.444 is an active terminology record that has no narrower child concepts, and its parent concept is S42.44 for fracture (avulsion) of medial epicondyle of humerus. 1

Documentation considerations

Clinical literature emphasizes that discerning the specific mechanism of an avulsion fracture is important because the mechanism can elucidate the likely pathology and provide insight into the treatment strategy. 2

When an avulsion fracture is suspected but not visualized on plain radiograph, clinical suspicion should lead to further workup including advanced imaging such as CT, MRI, or ultrasound to define the damage extent. 2

What the sources add

While the terminology record provides the exact code hierarchy and label, the clinical literature adds that avulsion fractures encompass diverse mechanisms and management strategies, making accurate incidence difficult to determine due to underreporting. 1 2

A Medicare coverage database search includes the S42.444 base code and its initial encounter variant S42.444B within an article, whereas the terminology explorer confirms the official version 2026 label without implying any specific payer coverage. 3 5

Sources

1. ICD-10-CM S42.444 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. MCD Search — cms.gov; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
5. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.