2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S90: its own notes plus those printed at block S90-S99 and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block S90-S99 Injuries to the ankle and foot applies to 3,324 codes
  • burns and corrosions (T20-T32)
  • fracture of ankle and malleolus (S82.-)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

  • The appropriate 7th character is to be added to each code from category S90
Values for category S90 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name S90, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming S90: its condition is not part of those codes, and both may be reported when the patient has both.

  • S80 Superficial injury of knee and lower leg
    superficial injury of ankle and foot (S90.-)

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S90Overview

What is the ICD-10 code for superficial injury of ankle, foot and toes?

S90 is the ICD-10-CM category for superficial injury of ankle, foot and toes, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.