S82.392B vs S82.399B

S82.392B (Other fracture of lower end of left tibia, initial encounter for open fracture type I or II) compared with S82.399B (Other fracture of lower end of unspecified tibia, initial encounter for open fracture type I or II), from the official CMS tabular data. S82.392B and S82.399B code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S82.392B

Left

Other fracture of lower end of left tibia, initial encounter for open fracture type I or II

↔

S82.399B

Unspecified

Other fracture of lower end 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. S82.392B and S82.399B 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

	S82.392BOther fracture of lower end of left tibia, initial encounter for open fracture type I or II	S82.399BOther fracture of lower end of unspecified tibia, initial encounter for open fracture type I or II
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	Other fracture of lower end of left tibia, initial encounter for open fracture type I or II is a billable ICD-10-CM diagnosis code (S82.392B).	Other fracture of lower end of unspecified tibia, initial encounter for open fracture type I or II is a billable ICD-10-CM diagnosis code (S82.399B).
7th character	The appropriate 7th character is to be added to all codes from category S82	The appropriate 7th character is to be added to all codes from category S82
Includes	fracture of malleolus	fracture of malleolus

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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