S66.929A Laceration of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S66.929 with 7th character A (initial encounter).

Applies from S66 Injury of muscle, fascia and tendon at wrist and hand level

Excludes2 (not included here)

• sprain of joints and ligaments of wrist and hand (S63.-)

Code also

• any associated open wound (S61.-)

7th character note

• The appropriate 7th character is to be added to each code from category S66

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 S66.929A

Back-references to S66

• Type 2 Excludes: S56 Injury of muscle, fascia and tendon at forearm level ("injury of muscle, fascia and tendon at or below wrist (S66.-)")
• Type 2 Excludes: S63 Dislocation and sprain of joints and ligaments at wrist and hand level ("strain of muscle, fascia and tendon of wrist and hand (S66.-)")

Nearby codes

• S66.922 Laceration of unspecified muscle, fascia and tendon at wrist and hand level, left hand
• S66.922A Laceration of unspecified muscle, fascia and tendon at wrist and hand level, left hand, initial encounter
• S66.922D Laceration of unspecified muscle, fascia and tendon at wrist and hand level, left hand, subsequent encounter
• S66.922S Laceration of unspecified muscle, fascia and tendon at wrist and hand level, left hand, sequela
• S66.929 Laceration of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand
• S66.929A Laceration of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, initial encounter (this code)
• S66.929D Laceration of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, subsequent encounter
• S66.929S Laceration of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, sequela
• S66.99 Other injury of unspecified muscle, fascia and tendon at wrist and hand level
• S66.991 Other injury of unspecified muscle, fascia and tendon at wrist and hand level, right hand
• S66.991A Other injury of unspecified muscle, fascia and tendon at wrist and hand level, right hand, initial encounter