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S42.434A vs S42.435A

S42.434A (Nondisplaced fracture (avulsion) of lateral epicondyle of right humerus, initial encounter for closed fracture) compared with S42.435A (Nondisplaced fracture (avulsion) of lateral epicondyle of left humerus, initial encounter for closed fracture), from the official CMS tabular data. S42.434A and S42.435A code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S42.434A
Right
Nondisplaced fracture (avulsion) of lateral epicondyle of right humerus, initial encounter for closed fracture
↔
S42.435A
Left
Nondisplaced fracture (avulsion) of lateral epicondyle of left humerus, initial encounter for closed fracture

Same condition; these differ only in which side is documented.

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source: ICD-10-CM tabular list (laterality variant derived from the code title)

Can these codes be reported together?

Same condition, opposite side. S42.434A and S42.435A name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

Side by side

S42.434ANondisplaced fracture (avulsion) of lateral epicondyle of right humerus, initial encounter for closed fractureS42.435ANondisplaced fracture (avulsion) of lateral epicondyle of left humerus, initial encounter for closed fracture
Billing statusBillableBillable
ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionNondisplaced fracture (avulsion) of lateral epicondyle of right humerus, initial encounter for closed fracture is a billable ICD-10-CM diagnosis code (S42.434A).Nondisplaced fracture (avulsion) of lateral epicondyle of left humerus, initial encounter for closed fracture is a billable ICD-10-CM diagnosis code (S42.435A).
7th characterThe appropriate 7th character is to be added to all codes from category S42The appropriate 7th character is to be added to all codes from category S42
Includes
injuries of axilla
injuries of scapular region
injuries of axilla
injuries of scapular region
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources