S66.999S Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, sequela

Billable ICD-10-CM code, FY2026.

Built from S66.999 with 7th character S (sequela).

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

Code annotations containing back-references to S66.999S

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

• S66.992D Other injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand, subsequent encounter
• S66.992S Other injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand, sequela
• S66.999 Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand
• S66.999A Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, initial encounter
• S66.999D Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, subsequent encounter
• S66.999S Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, sequela (this code)