T84.116A vs T84.117A

T84.116A (Breakdown (mechanical) of internal fixation device of bone of right lower leg, initial encounter) compared with T84.117A (Breakdown (mechanical) of internal fixation device of bone of left lower leg, initial encounter), from the official CMS tabular data. T84.116A and T84.117A code the same condition on opposite sides.

Relationship

Review

Laterality relationship

T84.116A

Right

Breakdown (mechanical) of internal fixation device of bone of right lower leg, initial encounter

↔

T84.117A

Left

Breakdown (mechanical) of internal fixation device of bone of left lower leg, initial encounter

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. T84.116A and T84.117A 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

	T84.116ABreakdown (mechanical) of internal fixation device of bone of right lower leg, initial encounter	T84.117ABreakdown (mechanical) of internal fixation device of bone of left lower leg, initial encounter
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	Breakdown (mechanical) of internal fixation device of bone of right lower leg, initial encounter is a billable ICD-10-CM diagnosis code (T84.116A).	Breakdown (mechanical) of internal fixation device of bone of left lower leg, initial encounter is a billable ICD-10-CM diagnosis code (T84.117A).
7th character	The appropriate 7th character is to be added to each code from category T84	The appropriate 7th character is to be added to each code from category T84
Use additional code	code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) code(s) to identify the specified condition resulting from the complication code to identify devices involved and details of circumstances (Y62-Y82)	code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) code(s) to identify the specified condition resulting from the complication code to identify devices involved and details of circumstances (Y62-Y82)

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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