S62.316B Displaced fracture of base of fifth metacarpal bone, right hand, initial encounter for open fracture

ICD-10-CM S62.316B: Displaced fracture of base of fifth metacarpal bone, right hand, initial encounter for open fracture

ICD-10-CM code S62.316B identifies a displaced fracture of the base of the right hand's fifth metacarpal bone during an initial encounter for an open fracture. The concept is classified as an injury or poisoning, and its parent concept is a displaced fracture of the base of the right fifth metacarpal bone. 1 3

Plain-language overview

This diagnosis code represents a specific bone injury where the broken pieces of the right hand's fifth metacarpal base are out of place and the fracture is open during the first encounter for care. 1

What this code represents

The terminology record classifies S62.316B with the semantic type of Injury or Poisoning and assigns it an active record status within the ICD-10-CM version 2026 system. 1

The parent concept for this specific diagnosis is S62.316, which denotes a displaced fracture of the base of the fifth metacarpal bone in the right hand without the encounter specifics. 1

Coding details

The official terminology record for S62.316B includes an abbreviation noting it stands for a displaced fracture of the base of the right fifth metacarpal bone, initial encounter for an open fracture. 1

A distinct related code, S62.346B, represents a nondisplaced fracture of the base of the right fifth metacarpal bone during an initial encounter for an open fracture. 4

Documentation considerations

The official terminology record establishes that the code label explicitly combines laterality, fracture displacement, anatomical location, and encounter type into a single descriptive concept. 1

Clinical context

Anatomical literature indicates the dorsal branch of the ulnar nerve is vulnerable to injury during surgical fixation of fourth and fifth metacarpal bone fractures due to its proximity to the bones. 2

What the sources add

While the terminology record defines the code structure, a clinical case report provides operational context regarding potential nerve injuries during surgical fixation of fifth metacarpal fractures. 1 2

Coverage and utilization context

A Medicare billing and coding article includes S62.316B in a list of diagnosis codes, providing an example of the code appearing in an administrative context. 3

Sources

1. ICD-10-CM S62.316B terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Ulnar Nerve Injury during Treatment of Fourth and Fifth Metacarpal Fractures: A Case Report and Anatomical Review — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Immunizations (A56900) — cms.gov; accessed 2026-07-27.
4. ICD-10-CM 2024 | S62.3 - Fracture of other and unspecified metacarpal bone — unboundmedicine.com; accessed 2026-07-27.