S78.129A Partial traumatic amputation at level between unspecified hip and knee, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S78.129 with 7th character A (initial encounter).

Applies from S78 Traumatic amputation of hip and thigh

Applicable to

• An amputation not identified as partial or complete should be coded to complete

Excludes1 (never code together)

• traumatic amputation of knee (S88.0-)

7th character note

• The appropriate 7th character is to be added to each code from category S78

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Applies from S78.1 Traumatic amputation at level between hip and knee

Excludes1 (never code together)

• traumatic amputation of knee (S88.0-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 405 — Traumatic Amputations and Complications
• CMS-HCC V22: HCC 173 — Traumatic Amputations and Complications
• ESRD V24: HCC 173

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to S78.129A

Back-references to S78

• Type 1 Excludes: S71 Open wound of hip and thigh ("traumatic amputation of hip and thigh (S78.-)")
• Type 1 Excludes: S72 Fracture of femur ("traumatic amputation of hip and thigh (S78.-)")

Nearby codes

• S78.122 Partial traumatic amputation at level between left hip and knee
• S78.122A Partial traumatic amputation at level between left hip and knee, initial encounter
• S78.122D Partial traumatic amputation at level between left hip and knee, subsequent encounter
• S78.122S Partial traumatic amputation at level between left hip and knee, sequela
• S78.129 Partial traumatic amputation at level between unspecified hip and knee
• S78.129A Partial traumatic amputation at level between unspecified hip and knee, initial encounter (this code)
• S78.129D Partial traumatic amputation at level between unspecified hip and knee, subsequent encounter
• S78.129S Partial traumatic amputation at level between unspecified hip and knee, sequela
• S78.9 Traumatic amputation of hip and thigh, level unspecified
• S78.91 Complete traumatic amputation of hip and thigh, level unspecified
• S78.911 Complete traumatic amputation of right hip and thigh, level unspecified