S79.929 Unspecified injury of unspecified thigh

ICD-10-CM Diagnosis Code S79.929: Unspecified injury of unspecified thigh

ICD-10-CM code S79.929 designates an unspecified injury of an unspecified thigh, functioning as an active diagnosis concept within the injury and poisoning classification. It exists as a narrower concept under the parent code for unspecified thigh injury. This reference outlines the code's structural hierarchy and coding context based on available public sources. 1 3

Plain-language overview

The terminology record for S79.929 assigns the preferred name unspecified injury of unspecified thigh and maintains an active status within the ICD-10-CM version 2026. 1

What this code represents

The official terminology record assigns the preferred name unspecified injury of unspecified thigh to S79.929 and classifies its semantic type as injury or poisoning. 1

Within the coding hierarchy, S79.929 is a child concept of S79.92, which is the code for an unspecified injury of the thigh, and currently has no narrower subordinate concepts. 1

Coding details

Code S79.929 is listed alongside lateralized alternatives S79.921 for right thigh injuries and S79.922 for left thigh injuries within the same unspecified injury subcategory. 3

The broader subcategory S79.9 for unspecified injuries of the hip and thigh includes a directive to append an appropriate seventh character to each code, such as for initial encounters. 3

Documentation considerations

The coding hierarchy lists distinct options for right thigh, left thigh, and unspecified thigh injuries, providing different codes based on the documented laterality of the injury. 3

Clinical context

Clinical literature describes thigh conditions involving pain and dysesthesia caused by compression or injury to the lateral femoral cutaneous nerve as it enters the anterior thigh. 2

What the sources add

The terminology record establishes the official label and active status for S79.929, whereas the coding center excerpt provides the surrounding hierarchical structure and seventh-character rules for the subcategory. 1 3

While the terminology record defines S79.929 as an active administrative code, the clinical text describes specific nerve injuries and compression mechanisms occurring in the anterior thigh region. 1 2

Sources

1. ICD-10-CM S79.929 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Coding: ICD-10-CM Section S70-S79 — medicalcodecenter.com; accessed 2026-07-27.
4. S79.9 - Unspecified injury of hip and thigh | ICD-10-CM — unboundmedicine.com; accessed 2026-07-27.