S40.84Header code — not billable
External constriction of upper arm
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- S40
- Effective date
- October 1, 2026
Related codes in category S40
S40Superficial injury of shoulder and upper armS40.0Contusion of shoulder and upper armS40.01Contusion of shoulderS40.011Contusion of right shoulderS40.011AContusion of right shoulder, initial encounterYesS40.011DContusion of right shoulder, subsequent encounterYesS40.011SContusion of right shoulder, sequelaYesS40.012Contusion of left shoulderS40.012AContusion of left shoulder, initial encounterYesS40.012DContusion of left shoulder, subsequent encounterYesS40.012SContusion of left shoulder, sequelaYesS40.019Contusion of unspecified shoulder
Frequently asked questions
What is ICD-10 code S40.84?
S40.84 is an ICD-10-CM diagnosis code for External constriction of upper arm.
Is S40.84 a billable code?
No. S40.84 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 S40.84 in?
S40.84 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did S40.84 become effective?
S40.84 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to S40.84?
S40.84 belongs to category S40, 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.