S58.929A Partial traumatic amputation of unspecified forearm, level unspecified, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S58.929 with 7th character A (initial encounter).

Applies from S58 Traumatic amputation of elbow and forearm

Applicable to

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

Excludes1 (never code together)

• traumatic amputation of wrist and hand (S68.-)

7th character note

• The appropriate 7th character is to be added to each code from category S58

7th character required

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

Applies from S58.9 Traumatic amputation of forearm, level unspecified

Excludes1 (never code together)

• traumatic amputation of wrist (S68.-)

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 S58.929A

Back-references to S58

• Type 1 Excludes: S51 Open wound of elbow and forearm ("traumatic amputation of elbow and forearm (S58.-)")
• Type 1 Excludes: S52 Fracture of forearm ("traumatic amputation of forearm (S58.-)")

Nearby codes

• S58.922 Partial traumatic amputation of left forearm, level unspecified
• S58.922A Partial traumatic amputation of left forearm, level unspecified, initial encounter
• S58.922D Partial traumatic amputation of left forearm, level unspecified, subsequent encounter
• S58.922S Partial traumatic amputation of left forearm, level unspecified, sequela
• S58.929 Partial traumatic amputation of unspecified forearm, level unspecified
• S58.929A Partial traumatic amputation of unspecified forearm, level unspecified, initial encounter (this code)
• S58.929D Partial traumatic amputation of unspecified forearm, level unspecified, subsequent encounter
• S58.929S Partial traumatic amputation of unspecified forearm, level unspecified, sequela