S46.392 Other injury of muscle, fascia and tendon of triceps, left arm

ICD-10-CM S46.392: Other injury of muscle, fascia and tendon of triceps, left arm

ICD-10-CM code S46.392 represents other injuries to the muscle, fascia, and tendon of the left triceps. It falls under the S46.39 category, which distinguishes these specific triceps injuries from lacerations and strains. The supplied sources establish the code hierarchy and descriptions, but lack details on clinical application and payer coverage. 4

Plain-language overview

Code S46.392 identifies an injury to the muscle, fascia, and tendon of the left triceps. The available sources provide this official description but do not offer plain-language explanations of symptoms or causes. 4

What this code represents

This diagnosis code belongs to the S46.39 category for other injuries of the triceps muscle, fascia, and tendon. The sources list this category alongside separate codes for lacerations and strains. 4

Coding details

The code S46.392 provides laterality by specifying the left arm. The source text lists this code alongside right arm and unspecified arm counterparts within the same injury category. 4

The S46.3 category encompasses various triceps injuries, including unspecified injuries, strains, lacerations, and other injuries. The provided hierarchy separates these distinct injury types into different code subcategories. 4

Documentation considerations

The supplied sources establish that S46.392 denotes an other injury of the left triceps, but they do not provide specific documentation rules or checklists for medical coders. 4

What the sources add

The CDC source categorizes S46.322 under upper extremity open wounds, while the CMS sources list S46.822A as a left arm laceration initial encounter. These listings demonstrate that different codes track specific injury types and encounter details. 1 2 3

Coverage and utilization context

The CMS articles include S46.822A in billing and coding publications for tetanus immunization and immune globulins. These sources list the code but do not state that its use guarantees coverage for any service. 2 3

Questions to verify

The provided sources do not indicate whether S46.392 requires a seventh character for encounter specificity. Coders must verify if initial or subsequent encounter modifiers apply to this code. 2 3 4

Sources

1. National Health Statistics Reports — cdc.gov; accessed 2026-07-25.
2. Article - Billing and Coding: Tetanus Immunization (A52438) — cms.gov; accessed 2026-07-25.
3. Article - Billing and Coding: Immune Globulins (A57554) — cms.gov; accessed 2026-07-25.
4. Coding: ICD-10-CM Section S40-S49 — medicalcodecenter.com; accessed 2026-07-25.