S42.352B vs S42.353B

S42.352B (Displaced comminuted fracture of shaft of humerus, left arm, initial encounter for open fracture) compared with S42.353B (Displaced comminuted fracture of shaft of humerus, unspecified arm, initial encounter for open fracture), from the official CMS tabular data. S42.352B and S42.353B code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

S42.352B

Left

Displaced comminuted fracture of shaft of humerus, left arm, initial encounter for open fracture

↔

S42.353B

Unspecified

Displaced comminuted fracture of shaft of humerus, unspecified arm, initial encounter for open 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. S42.352B and S42.353B 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

	S42.352BDisplaced comminuted fracture of shaft of humerus, left arm, initial encounter for open fracture	S42.353BDisplaced comminuted fracture of shaft of humerus, unspecified arm, initial encounter for open fracture
Billing status	Billable	Billable
Classification	S00-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)
Definition	Displaced comminuted fracture of shaft of humerus, left arm, initial encounter for open fracture is a billable ICD-10-CM diagnosis code (S42.352B).	Displaced comminuted fracture of shaft of humerus, unspecified arm, initial encounter for open fracture is a billable ICD-10-CM diagnosis code (S42.353B).
7th character	The appropriate 7th character is to be added to all codes from category S42	The 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