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S88.111A vs S88.111D

S88.111A (Complete traumatic amputation at level between knee and ankle, right lower leg, initial encounter) compared with S88.111D (Complete traumatic amputation at level between knee and ankle, right lower leg, subsequent encounter), from the official CMS tabular data. S88.111A and S88.111D code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

S88.111A
Initial encounter
Complete traumatic amputation at level between knee and ankle, right lower leg, initial encounter
S88.111D
Subsequent encounter
Complete traumatic amputation at level between knee and ankle, right lower leg, subsequent encounter

Same underlying diagnosis, different encounter phase.

The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.

Source: ICD-10-CM Official Guidelines, Section I.C.19.a

Can these codes be reported together?

Same injury, other encounter phase. S88.111A and S88.111D code the same injury at a different phase of treatment, set by the 7th character.

The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.

Side by side

S88.111AComplete traumatic amputation at level between knee and ankle, right lower leg, initial encounterS88.111DComplete traumatic amputation at level between knee and ankle, right lower leg, subsequent 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)
DefinitionComplete traumatic amputation at level between knee and ankle, right lower leg, initial encounter is a billable ICD-10-CM diagnosis code (S88.111A).Complete traumatic amputation at level between knee and ankle, right lower leg, subsequent encounter is a billable ICD-10-CM diagnosis code (S88.111D).
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