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S82.421M vs S82.422M

S82.421M (Displaced transverse fracture of shaft of right fibula, subsequent encounter for open fracture type I or II with nonunion) compared with S82.422M (Displaced transverse fracture of shaft of left fibula, subsequent encounter for open fracture type I or II with nonunion), from the official CMS tabular data. S82.421M and S82.422M code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S82.421M
Right
Displaced transverse fracture of shaft of right fibula, subsequent encounter for open fracture type I or II with nonunion
S82.422M
Left
Displaced transverse fracture of shaft of left fibula, subsequent encounter for open fracture type I or II with nonunion

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. S82.421M and S82.422M 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

S82.421MDisplaced transverse fracture of shaft of right fibula, subsequent encounter for open fracture type I or II with nonunionS82.422MDisplaced transverse fracture of shaft of left fibula, subsequent encounter for open fracture type I or II with nonunion
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)
DefinitionDisplaced transverse fracture of shaft of right fibula, subsequent encounter for open fracture type I or II with nonunion is a billable ICD-10-CM diagnosis code (S82.421M).Displaced transverse fracture of shaft of left fibula, subsequent encounter for open fracture type I or II with nonunion is a billable ICD-10-CM diagnosis code (S82.422M).
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