S85.179A Laceration of posterior tibial artery, unspecified leg, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S85.179 with 7th character A (initial encounter).

Applies from S85 Injury of blood vessels at lower leg level

Excludes2 (not included here)

• injury of blood vessels at ankle and foot level (S95.-)

Code also

• any associated open wound (S81.-)

7th character note

• The appropriate 7th character is to be added to each code from category S85

7th character required

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

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 S85.179A

Back-references to S85.1

• Type 2 Excludes: S95 Injury of blood vessels at ankle and foot level ("injury of posterior tibial artery and vein (S85.1-, S85.8-)")

Back-references to S85

• Type 2 Excludes: M23 Internal derangement of knee ("current injury - see injury of knee and lower leg (S80-S89)")
• Type 2 Excludes: S75 Injury of blood vessels at hip and thigh level ("injury of blood vessels at lower leg level (S85.-)")

Nearby codes

• S85.172 Laceration of posterior tibial artery, left leg
• S85.172A Laceration of posterior tibial artery, left leg, initial encounter
• S85.172D Laceration of posterior tibial artery, left leg, subsequent encounter
• S85.172S Laceration of posterior tibial artery, left leg, sequela
• S85.179 Laceration of posterior tibial artery, unspecified leg
• S85.179A Laceration of posterior tibial artery, unspecified leg, initial encounter (this code)
• S85.179D Laceration of posterior tibial artery, unspecified leg, subsequent encounter
• S85.179S Laceration of posterior tibial artery, unspecified leg, sequela
• S85.18 Other specified injury of posterior tibial artery
• S85.181 Other specified injury of posterior tibial artery, right leg
• S85.181A Other specified injury of posterior tibial artery, right leg, initial encounter