S61.109A Unspecified open wound of unspecified thumb with damage to nail, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S61.109 with 7th character A (initial encounter).

Applies from S61 Open wound of wrist, hand and fingers

Excludes1 (never code together)

• open fracture of wrist, hand and finger (S62.- with 7th character B)
• traumatic amputation of wrist and hand (S68.-)

Code also

• any associated wound infection

7th character note

• The appropriate 7th character is to be added to each code from category S61

7th character required

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

Code annotations containing back-references to S61.109A

Back-references to S61.1

• Type 1 Excludes: S61.0 Open wound of thumb without damage to nail ("open wound of thumb with damage to nail (S61.1-)")

Back-references to S61

• Type 2 Excludes: S51 Open wound of elbow and forearm ("open wound of wrist and hand (S61.-)")
• Code Also: S64 Injury of nerves at wrist and hand level ("any associated open wound (S61.-)")
• Code Also: S65 Injury of blood vessels at wrist and hand level ("any associated open wound (S61.-)")
• Code Also: S66 Injury of muscle, fascia and tendon at wrist and hand level ("any associated open wound (S61.-)")
• Use Additional: S67 Crushing injury of wrist, hand and fingers ("open wound of wrist and hand (S61.-)")

Diagnosis Index entries for S61.109A

• Wound, open › thumb › with › damage to nail

Nearby codes

• S61.102 Unspecified open wound of left thumb with damage to nail
• S61.102A Unspecified open wound of left thumb with damage to nail, initial encounter
• S61.102D Unspecified open wound of left thumb with damage to nail, subsequent encounter
• S61.102S Unspecified open wound of left thumb with damage to nail, sequela
• S61.109 Unspecified open wound of unspecified thumb with damage to nail
• S61.109A Unspecified open wound of unspecified thumb with damage to nail, initial encounter (this code)
• S61.109D Unspecified open wound of unspecified thumb with damage to nail, subsequent encounter
• S61.109S Unspecified open wound of unspecified thumb with damage to nail, sequela
• S61.11 Laceration without foreign body of thumb with damage to nail
• S61.111 Laceration without foreign body of right thumb with damage to nail
• S61.111A Laceration without foreign body of right thumb with damage to nail, initial encounter