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ICD-10-CM 2027 diagnosis code

S99.109Unspecified physeal fracture of unspecified metatarsal

Not billable — use a more specific codeRequires 7th character

S99.109 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it and add the required 7th character.

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S99.109

S99.109 is the ICD-10-CM diagnosis code for unspecified physeal fracture of unspecified metatarsal. 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 7 subcodes must be used instead.

Within S99.10, choose S99.109 (unspecified metatarsal) only when documentation doesn't support a more specific option: right metatarsal (S99.101) and left metatarsal (S99.102).

Codes in this range require a 7th character: A for initial encounter for closed fracture, B for initial encounter for open fracture, D for subsequent encounter for fracture with routine healing, G for subsequent encounter for fracture with delayed healing, K for subsequent encounter for fracture with nonunion, P for subsequent encounter for fracture with malunion and 1 more. Use placeholder "X" characters to fill any empty positions before the 7th character.

It was added in FY2017, effective October 1, 2016.

7th character

The appropriate 7th character is to be added to each code from subcategories S99.1

  • Ainitial encounter for closed fractureS99.109A
  • Binitial encounter for open fractureS99.109B
  • Dsubsequent encounter for fracture with routine healingS99.109D
  • Gsubsequent encounter for fracture with delayed healingS99.109G
  • Ksubsequent encounter for fracture with nonunionS99.109K
  • Psubsequent encounter for fracture with malunionS99.109P
  • SsequelaS99.109S

Notes that apply from higher levels

Instructions written at a parent level also apply to S99.109.

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
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about S99.109

Is S99.109 billable?

No. S99.109 is a header code. Report one of its more specific subcodes instead.