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S82.55XB vs S82.56XB

S82.55XB (Nondisplaced fracture of medial malleolus of left tibia, initial encounter for open fracture type I or II) compared with S82.56XB (Nondisplaced fracture of medial malleolus of unspecified tibia, initial encounter for open fracture type I or II), from the official CMS tabular data. S82.55XB and S82.56XB code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S82.55XB
Left
Nondisplaced fracture of medial malleolus of left tibia, initial encounter for open fracture type I or II
S82.56XB
Unspecified
Nondisplaced fracture of medial malleolus of unspecified tibia, initial encounter for open fracture type I or II

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. S82.55XB and S82.56XB 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

S82.55XBNondisplaced fracture of medial malleolus of left tibia, initial encounter for open fracture type I or IIS82.56XBNondisplaced fracture of medial malleolus of unspecified tibia, initial encounter for open fracture type I or II
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 of medial malleolus of left tibia, initial encounter for open fracture type I or II is a billable ICD-10-CM diagnosis code (S82.55B).Nondisplaced fracture of medial malleolus of unspecified tibia, initial encounter for open fracture type I or II is a billable ICD-10-CM diagnosis code (S82.56B).
7th characterThe appropriate 7th character is to be added to all codes from category S82The appropriate 7th character is to be added to all codes from category S82
Includes
fracture of malleolus
fracture of malleolus

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources