S98.131 Complete traumatic amputation of one right lesser toe

ICD-10-CM S98.131: Complete traumatic amputation of one right lesser toe

ICD-10-CM code S98.131 represents the complete traumatic amputation of one right lesser toe. This diagnostic code distinguishes the injury by laterality and anatomical specificity, separating it from amputations of the great toe or multiple toes. Trauma is identified as a cause of lower-extremity amputations. The base code is listed with an initial encounter character in official Medicare materials. 4 1 2

Plain-language overview

Code S98.131 identifies a complete traumatic amputation of one right lesser toe. This code specifies the right side and applies to a lesser toe, distinguishing it from injuries involving the great toe or multiple toes. 4

What this code represents

The code S98.131 belongs to the S98.13 category for the complete traumatic amputation of one lesser toe. Within this category, S98.131 specifically denotes the right lesser toe, while S98.132 and S98.139 denote the left and unspecified lesser toes, respectively. 4

The S98 category structure separates complete amputations from partial amputations. S98.131 represents a complete amputation of one right lesser toe, whereas S98.141 represents a partial amputation of one right lesser toe. 4

Coding details

Official Medicare claims processing materials list S98.131A as the complete traumatic amputation of one right lesser toe, initial encounter. This listing in the CMS manual pairs the base code S98.131 with the initial encounter character A. 2

The code S98.131 for one right lesser toe is distinct from S98.211, which describes the complete traumatic amputation of two or more right lesser toes. This distinction allows for coding specificity based on the number of toes amputated. 4

Clinical context

Trauma is identified as a cause leading to lower-extremity amputation. Other causes listed for lower-extremity amputations include diabetes mellitus, peripheral vascular disease, and neuropathy. 1

Documentation considerations

The S98 category hierarchy includes separate codes for right, left, and unspecified sides, as well as for great toes versus lesser toes. The code S98.131 explicitly represents the complete traumatic amputation of one right lesser toe. 4

What the sources add

The CMS claims processing manual lists S98.131A as an initial encounter code, while the ICD-10-CM code structure source lists S98.131 as the base code for a complete traumatic amputation of one right lesser toe. Together, these sources show the base code and its initial encounter variation. 2 4

A clinical reference identifies trauma as a cause of lower-extremity amputations, and a coding reference details the specific anatomical and laterality distinctions for the S98.131 code. These sources provide complementary clinical and coding context for traumatic toe amputations. 1 4

Sources

1. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-25.
2. Medicare Claims Processing Manual Chapter 5 - Part B — cms.gov; accessed 2026-07-25.
3. Article - Billing and Coding: Wound and Ulcer Care (A58565) — cms.gov; accessed 2026-07-25.
4. Coding: ICD-10-CM Section S90-S99 — medicalcodecenter.com; accessed 2026-07-25.