2026 ICD-10-CM Diagnosis Code S90Superficial injury of ankle, foot and toes

ICD-10-CM Codes›S00–T88›S90-S99›S90

ICD-10-CM S90
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S90 is a non-billable ICD-10-CM category code for superficial injury of ankle, foot and toes, so it cannot be submitted on claims. Use a more specific code from this category instead, such as S90.00XA, S90.00XD, S90.00XS, and S90.01XA.

Code Identity

ICD-10-CM Code
S90
Billable Status
No — Non-Billable Category
Code Describes
Superficial injury of ankle, foot and toes
Short Description
Superficial injury of ankle, foot and toes
Same as the full description in the CMS dataset.
Chapter
S90-S99
Injuries to the ankle and foot

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS90-S99Injuries to the ankle and foot
CategoryS90Superficial injury of ankle, foot and toes
This CodeS90Superficial injury of ankle, foot and toes

Specific Coding for Superficial injury of ankle, foot and toesOverview

Non-specific codes like S90 require more characters. Use one of these billable codes instead:

  • S90.0 for Contusion of ankle

  • S90.00 for Contusion of unspecified ankle

  • S90.01 for Contusion of right ankle

  • S90.02 for Contusion of left ankle

  • S90.1 for Contusion of toe without damage to nail

  • S90.11 for Contusion of great toe without damage to nail

  • S90.12 for Contusion of lesser toe without damage to nail

  • S90.2 for Contusion of toe with damage to nail

  • S90.21 for Contusion of great toe with damage to nail

  • S90.22 for Contusion of lesser toe with damage to nail

  • S90.3 for Contusion of foot

  • S90.30 for Contusion of unspecified foot

  • S90.31 for Contusion of right foot

  • S90.32 for Contusion of left foot

  • S90.4 for Other superficial injuries of toe

  • S90.41 for Abrasion of toe

  • S90.42 for Blister (nonthermal) of toe

  • S90.44 for External constriction of toe

  • S90.45 for Superficial foreign body of toe

  • S90.46 for Insect bite (nonvenomous) of toe

  • S90.47 for Other superficial bite of toe

  • S90.5 for Other superficial injuries of ankle

  • S90.51 for Abrasion of ankle

  • S90.52 for Blister (nonthermal) of ankle

  • S90.54 for External constriction of ankle

  • S90.55 for Superficial foreign body of ankle

  • S90.56 for Insect bite (nonvenomous) of ankle

  • S90.57 for Other superficial bite of ankle

  • S90.8 for Other superficial injuries of foot

  • S90.81 for Abrasion of foot

  • S90.82 for Blister (nonthermal) of foot

  • S90.84 for External constriction of foot

  • S90.85 for Superficial foreign body of foot

  • S90.86 for Insect bite (nonvenomous) of foot

  • S90.87 for Other superficial bite of foot

  • S90.9 for Unspecified superficial injury of ankle, foot and toe

  • S90.91 for Unspecified superficial injury of ankle

  • S90.92 for Unspecified superficial injury of foot

  • S90.93 for Unspecified superficial injury of toes

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Superficial injury of ankle, foot and toes (S90). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

7th Character Note

  • The appropriate 7th character is to be added to each code from category S90

7th Character

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Patient EducationClinical

Wounds and Injuries

An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S90Overview

Is S90 (Superficial injury of ankle, foot and toes) a billable code?

No. This is a category header that groups the codes for superficial injury of ankle, foot and toes, and headers cannot be submitted on claims. Claims for superficial injury of ankle, foot and toes need a more specific code from this category, such as S90.00XA, S90.00XD, and S90.00XS.