S46.399Header code — not billable
Other injury of muscle, fascia and tendon of triceps, unspecified arm
Short description: Oth injury of muscle, fascia and tendon of triceps, unsp arm
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- S46
- Effective date
- October 1, 2026
Related codes in category S46
S46Injury of muscle, fascia and tendon at shldr/up armS46.0Injury of musc/tend the rotator cuff of shoulderS46.00Unsp injury of musc/tend the rotator cuff of shoulderS46.001Unsp injury of musc/tend the rotator cuff of right shoulderS46.001AUnsp inj musc/tend the rotator cuff of r shoulder, initYesS46.001DUnsp inj musc/tend the rotator cuff of r shoulder, subsYesS46.001SUnsp inj musc/tend the rotator cuff of r shoulder, sequelaYesS46.002Unsp injury of musc/tend the rotator cuff of left shoulderS46.002AUnsp inj musc/tend the rotator cuff of l shoulder, initYesS46.002DUnsp inj musc/tend the rotator cuff of l shoulder, subsYesS46.002SUnsp inj musc/tend the rotator cuff of l shoulder, sequelaYesS46.009Unsp injury of musc/tend the rotator cuff of unsp shoulder
Frequently asked questions
What is ICD-10 code S46.399?
S46.399 is an ICD-10-CM diagnosis code for Other injury of muscle, fascia and tendon of triceps, unspecified arm.
Is S46.399 a billable code?
No. S46.399 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 S46.399 in?
S46.399 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did S46.399 become effective?
S46.399 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to S46.399?
S46.399 belongs to category S46, 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.