S90.121A Contusion of right lesser toe(s) without damage to nail, initial encounter

ICD-10-CM Diagnosis Code S90.121A

ICD-10-CM code S90.121A identifies a contusion of the right lesser toe(s) without damage to the nail during an initial encounter. This terminology record is active and classifies the concept as an injury or poisoning. The code is a narrower concept derived from its parent code, S90.121. 1 4

Plain-language overview

Code S90.121A applies to a contusion of the right lesser toe(s) without damage to the nail, specifically for the initial encounter for this injury, according to the official terminology record. 1

What this code represents

The official descriptor for S90.121A is contusion of right lesser toe(s) without damage to nail, initial encounter, and the terminology record classifies its semantic type as an injury or poisoning. 1

S90.121A is a narrower concept under the parent code S90.121, which describes a contusion of right lesser toe(s) without damage to nail, and the record status for S90.121A is active. 1

Coding details

The code S90.121A is recognized in the ICD10CM code system, appearing in version 2023 records and version 2026 terminology data with the identical descriptor. 1 4

The official published abbreviation for S90.121A is contusion of right lesser toe(s) w/o damage to nail, init., according to the 2026 terminology record. 1

Documentation considerations

The official descriptor for S90.121A specifies the injury as a contusion, identifies the right lesser toe(s), indicates no nail damage, and designates the initial encounter. 1

What the sources add

The 2026 terminology record provides the active status, parent concept, and semantic type for S90.121A, while the 2023 code system record confirms the code and descriptor within the ICD10CM system. 1 4

Both the v38.0 and v42.1 CMS manuals list neighboring right lesser toe contusion codes, such as contusion of right lesser toe(s) with damage to nail, initial encounter, distinguishing them from the without damage to nail descriptor. 2 3

Sources

1. ICD-10-CM S90.121A terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. ICD-10-CM/PCS MS-DRG v38.0 Definitions Manual — cms.gov; accessed 2026-07-27.
3. ICD-10-CM/PCS MS-DRG v42.1 Definitions Manual — cms.gov; accessed 2026-07-27.
4. Browse Code Systems — vsac.nlm.nih.gov; accessed 2026-07-27.