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S88.121S vs S88.129S

S88.121S (Partial traumatic amputation at level between knee and ankle, right lower leg, sequela) compared with S88.129S (Partial traumatic amputation at level between knee and ankle, unspecified lower leg, sequela), from the official CMS tabular data. S88.121S and S88.129S code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

S88.121S
Right
Partial traumatic amputation at level between knee and ankle, right lower leg, sequela
S88.129S
Unspecified
Partial traumatic amputation at level between knee and ankle, unspecified lower leg, sequela

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. S88.121S and S88.129S 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

S88.121SPartial traumatic amputation at level between knee and ankle, right lower leg, sequelaS88.129SPartial traumatic amputation at level between knee and ankle, unspecified lower leg, sequela
Billing statusBillableBillable
ClassificationS00-T88 — Injury, poisoning and certain other consequences of external causesS00-T88 — Injury, poisoning and certain other consequences of external causes
DefinitionPartial traumatic amputation at level between knee and ankle, right lower leg, sequela is a billable ICD-10-CM diagnosis code (S88.121S).Partial traumatic amputation at level between knee and ankle, unspecified lower leg, sequela is a billable ICD-10-CM diagnosis code (S88.129S).
7th characterThe appropriate 7th character is to be added to each code from category S88The appropriate 7th character is to be added to each code from category S88

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources