S42.464B vs S42.466B

S42.464B (Nondisplaced fracture of medial condyle of right humerus, initial encounter for open fracture) compared with S42.466B (Nondisplaced fracture of medial condyle of unspecified humerus, initial encounter for open fracture), from the official CMS tabular data. S42.464B and S42.466B code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

S42.464B

Right

Nondisplaced fracture of medial condyle of right humerus, initial encounter for open fracture

↔

S42.466B

Unspecified

Nondisplaced fracture of medial condyle of unspecified humerus, 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. S42.464B and S42.466B 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

	S42.464BNondisplaced fracture of medial condyle of right humerus, initial encounter for open fracture	S42.466BNondisplaced fracture of medial condyle of unspecified humerus, initial encounter for open fracture
Billing status	Billable	Billable
Classification	S00-T88 — Injury, poisoning and certain other consequences of external causes	S00-T88 — Injury, poisoning and certain other consequences of external causes
Definition	Nondisplaced fracture of medial condyle of right humerus, initial encounter for open fracture is a billable ICD-10-CM diagnosis code (S42.464B).	Nondisplaced fracture of medial condyle of unspecified humerus, initial encounter for open fracture is a billable ICD-10-CM diagnosis code (S42.466B).
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