S98.029A Partial traumatic amputation of unspecified foot at ankle level, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S98.029 with 7th character A (initial encounter).

Applies from S98 Traumatic amputation of ankle and foot

Applicable to

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

7th character note

• The appropriate 7th character is to be added to each code from category S98

7th character required

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

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 S98.029A

Back-references to S98

• Type 1 Excludes: S88 Traumatic amputation of lower leg ("traumatic amputation of ankle and foot (S98.-)")
• Type 1 Excludes: S91 Open wound of ankle, foot and toes ("traumatic amputation of ankle and foot (S98.-)")
• Type 2 Excludes: S92 Fracture of foot and toe, except ankle ("traumatic amputation of ankle and foot (S98.-)")

Nearby codes

• S98.022 Partial traumatic amputation of left foot at ankle level
• S98.022A Partial traumatic amputation of left foot at ankle level, initial encounter
• S98.022D Partial traumatic amputation of left foot at ankle level, subsequent encounter
• S98.022S Partial traumatic amputation of left foot at ankle level, sequela
• S98.029 Partial traumatic amputation of unspecified foot at ankle level
• S98.029A Partial traumatic amputation of unspecified foot at ankle level, initial encounter (this code)
• S98.029D Partial traumatic amputation of unspecified foot at ankle level, subsequent encounter
• S98.029S Partial traumatic amputation of unspecified foot at ankle level, sequela
• S98.1 Traumatic amputation of one toe
• S98.11 Complete traumatic amputation of great toe
• S98.111 Complete traumatic amputation of right great toe