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Dx

ICD-10-CM 2027 diagnosis code

S99.8Other specified injuries of ankle and foot

Not billable — use a more specific codeRequires 7th character

S99.8 is a header code, so it can't be reported by itself. Choose one of the 2 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 S99.8

S99.8 is the ICD-10-CM diagnosis code for other specified injuries of ankle and foot. It belongs to category S99 (other and unspecified injuries of ankle and foot), 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 2 subcodes must be used instead.

Within S99, choose S99.8 (Other specified injuries of ankle and foot) only when documentation doesn't support a more specific option: physeal fracture of calcaneus (S99.0), physeal fracture of metatarsal (S99.1), physeal fracture of phalanx of toe (S99.2) and unspecified injury of ankle and foot (S99.9).

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.

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 subcategory S99.8

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to S99.8.

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.

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 S99.8

Is S99.8 billable?

No. S99.8 is a header code. Report one of its more specific subcodes instead.