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ICD-10-CM 2027 diagnosis code

S90.57Other superficial bite of ankle

Not billable — use a more specific codeRequires 7th character

S90.57 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S90.57

S90.57 is the ICD-10-CM diagnosis code for other superficial bite of ankle. It belongs to category S90 (superficial injury of ankle, foot and toes), block S90-S99 (injuries to the ankle and foot) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within S90.5, choose S90.57 (Other superficial bite of ankle) only when documentation doesn't support a more specific option: abrasion of ankle (S90.51), Blister (nonthermal) of ankle (S90.52), external constriction of ankle (S90.54), superficial foreign body of ankle (S90.55) and insect bite (nonvenomous) of ankle (S90.56).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

Don't report S90.57 together with the conditions in its Excludes1 note: open bite of ankle (S91.05-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

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

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Coding notes

Excludes1Not coded here — never report together with this code

Notes that apply from higher levels

Instructions written at a parent level also apply to S90.57.

Broader instructions also apply from S90-S99 Injuries to the ankle and foot and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to S90.57.

Codes whose notes reference S90.57

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about S90.57

Is S90.57 billable?

No. S90.57 is a header code. Report one of its more specific subcodes instead.