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ICD-10-CM 2027 diagnosis code

W21.12Struck by tennis racquet

Not billable — use a more specific codeRequires 7th character

W21.12 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 W21.12

W21.12 is the ICD-10-CM diagnosis code for struck by tennis racquet. It belongs to category W21 (striking against or struck by sports equipment), block W20-W49 (exposure to inanimate mechanical forces) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within W21.1 (struck by bat, racquet or club), W21.12 is specifically for struck by tennis racquet. Related codes cover baseball bat (W21.11), golf club (W21.13) and other bat, racquet or club (W21.19).

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 category W21

Notes that apply from higher levels

Instructions written at a parent level also apply to W21.12.

› From W21 Striking against or struck by sports equipment
Excludes1
  • assault with sports equipment (Y08.0-)
  • striking against or struck by sports equipment with subsequent fall (W18.01)

Broader instructions also apply from W20-W49 Exposure to inanimate mechanical forces and Chapter 20: External causes of morbidity.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to W21.12.

  • Struck (accidentally) by › bat or racquet › tennis racquet
  • Struck (accidentally) by › object › projected › in sports › bat or racquet › tennis racquet
  • Struck (accidentally) by › object › thrown › in sports › bat or racquet › tennis racquet
  • Struck (accidentally) by › sports equipment › bat or racquet › tennis racquet

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 W21.12

Is W21.12 billable?

No. W21.12 is a header code. Report one of its more specific subcodes instead.