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S58.121A vs S58.122A

S58.121A (Partial traumatic amputation at level between elbow and wrist, right arm, initial encounter) compared with S58.122A (Partial traumatic amputation at level between elbow and wrist, left arm, initial encounter), from the official CMS tabular data. S58.121A and S58.122A code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S58.121A
Right
Partial traumatic amputation at level between elbow and wrist, right arm, initial encounter
↔
S58.122A
Left
Partial traumatic amputation at level between elbow and wrist, left arm, 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. S58.121A and S58.122A 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

S58.121APartial traumatic amputation at level between elbow and wrist, right arm, initial encounterS58.122APartial traumatic amputation at level between elbow and wrist, left arm, initial encounter
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)
DefinitionPartial traumatic amputation at level between elbow and wrist, right arm, initial encounter is a billable ICD-10-CM diagnosis code (S58.121A).Partial traumatic amputation at level between elbow and wrist, left arm, initial encounter is a billable ICD-10-CM diagnosis code (S58.122A).
7th characterThe appropriate 7th character is to be added to each code from category S58The appropriate 7th character is to be added to each code from category S58
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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