S56.001Header code — not billable

Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level

Short description: Unsp injury of flexor musc/fasc/tend r thm at forarm lv

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 levelS56.001AUnsp 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 levelS56.009AUnsp injury of flexor musc/fasc/tend thmb at forarm lv, initYes

Frequently asked questions

What is ICD-10 code S56.001?

S56.001 is an ICD-10-CM diagnosis code for Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level.

Is S56.001 a billable code?

No. S56.001 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 S56.001 in?

S56.001 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.

When did S56.001 become effective?

S56.001 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to S56.001?

S56.001 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.