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S58.029A vs S58.029D

S58.029A (Partial traumatic amputation at elbow level, unspecified arm, initial encounter) compared with S58.029D (Partial traumatic amputation at elbow level, unspecified arm, subsequent encounter), from the official CMS tabular data. S58.029A and S58.029D code the same injury at a different phase of treatment. MedCoder-derived

Relationship

Review

Encounter relationship

S58.029A
Initial encounter
Partial traumatic amputation at elbow level, unspecified arm, initial encounter
↔
S58.029D
Subsequent encounter
Partial traumatic amputation at elbow level, unspecified arm, 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. S58.029A and S58.029D 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

S58.029APartial traumatic amputation at elbow level, unspecified arm, initial encounterS58.029DPartial traumatic amputation at elbow level, unspecified arm, subsequent encounter
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 elbow level, unspecified arm, initial encounter is a billable ICD-10-CM diagnosis code (S58.029A).Partial traumatic amputation at elbow level, unspecified arm, subsequent encounter is a billable ICD-10-CM diagnosis code (S58.029D).
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