S56.099Header code — not billable
Other injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level
Short description: Inj flexor musc/fasc/tend thmb at forearm level
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- S56
- Effective date
- October 1, 2026
Related codes in category S56
S56Injury of muscle, fascia and tendon at forearm levelS56.0Injury of flexor musc/fasc/tend thumb at forearm levelS56.00Unsp injury of flexor musc/fasc/tend thumb at forearm levelS56.001Unsp injury of flexor musc/fasc/tend r thm at forarm lvS56.001AUnsp inj flexor musc/fasc/tend r thm at forarm lv, initYesS56.001DUnsp inj flexor musc/fasc/tend r thm at forarm lv, subsYesS56.001SUnsp inj flexor musc/fasc/tend r thm at forarm lv, sequelaYesS56.002Unsp injury of flexor musc/fasc/tend left thumb at forarm lvS56.002AUnsp inj flexor musc/fasc/tend l thm at forarm lv, initYesS56.002DUnsp inj flexor musc/fasc/tend l thm at forarm lv, subsYesS56.002SUnsp inj flexor musc/fasc/tend l thm at forarm lv, sequelaYesS56.009Unsp injury of flexor musc/fasc/tend thmb at forearm level
Frequently asked questions
What is ICD-10 code S56.099?
S56.099 is an ICD-10-CM diagnosis code for Other injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level.
Is S56.099 a billable code?
No. S56.099 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is S56.099 in?
S56.099 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did S56.099 become effective?
S56.099 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to S56.099?
S56.099 belongs to category S56, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.