S42.446Header code — not billable

Nondisplaced fracture (avulsion) of medial epicondyle of unspecified humerus

Short description: Nondisp fx (avulsion) of medial epicondyle of unsp humerus

Chapter
19. Injury, poisoning and certain other consequences of external causes
Category
S42
Effective date
October 1, 2026

Related codes in category S42

S42Fracture of shoulder and upper armS42.0Fracture of clavicleS42.00Fracture of unspecified part of clavicleS42.001Fracture of unspecified part of right clavicleS42.001AFracture of unsp part of right clavicle, init for clos fxYesS42.001BFracture of unsp part of right clavicle, init for opn fxYesS42.001DFx unsp part of r clavicle, subs for fx w routn healYesS42.001GFx unsp part of r clavicle, subs for fx w delay healYesS42.001KFracture of unsp part of r clavicle, subs for fx w nonunionYesS42.001PFracture of unsp part of r clavicle, subs for fx w malunionYesS42.001SFracture of unspecified part of right clavicle, sequelaYesS42.002Fracture of unspecified part of left clavicle

Frequently asked questions

What is ICD-10 code S42.446?

S42.446 is an ICD-10-CM diagnosis code for Nondisplaced fracture (avulsion) of medial epicondyle of unspecified humerus.

Is S42.446 a billable code?

No. S42.446 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 S42.446 in?

S42.446 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.

When did S42.446 become effective?

S42.446 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to S42.446?

S42.446 belongs to category S42, 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.