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S82.391K vs S82.399K

S82.391K (Other fracture of lower end of right tibia, subsequent encounter for closed fracture with nonunion) compared with S82.399K (Other fracture of lower end of unspecified tibia, subsequent encounter for closed fracture with nonunion), from the official CMS tabular data. S82.391K and S82.399K code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S82.391K
Right
Other fracture of lower end of right tibia, subsequent encounter for closed fracture with nonunion
S82.399K
Unspecified
Other fracture of lower end of unspecified tibia, subsequent encounter for closed fracture 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. S82.391K and S82.399K 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

S82.391KOther fracture of lower end of right tibia, subsequent encounter for closed fracture with nonunionS82.399KOther fracture of lower end of unspecified tibia, subsequent encounter for closed fracture 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)
DefinitionOther fracture of lower end of right tibia, subsequent encounter for closed fracture with nonunion is a billable ICD-10-CM diagnosis code (S82.391K).Other fracture of lower end of unspecified tibia, subsequent encounter for closed fracture with nonunion is a billable ICD-10-CM diagnosis code (S82.399K).
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