S63.042A Subluxation of carpometacarpal joint of left thumb, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S63.042 with 7th character A (initial encounter).

Applies from S63 Dislocation and sprain of joints and ligaments at wrist and hand level

Includes

• avulsion of joint or ligament at wrist and hand level
• laceration of cartilage, joint or ligament at wrist and hand level
• sprain of cartilage, joint or ligament at wrist and hand level
• traumatic hemarthrosis of joint or ligament at wrist and hand level
• traumatic rupture of joint or ligament at wrist and hand level
• traumatic subluxation of joint or ligament at wrist and hand level
• traumatic tear of joint or ligament at wrist and hand level

Excludes2 (not included here)

• strain of muscle, fascia and tendon of wrist and hand (S66.-)

Code also

• any associated open wound

7th character note

• The appropriate 7th character is to be added to each code from category S63

7th character required

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

Applies from S63.04 Subluxation and dislocation of carpometacarpal joint of thumb

Excludes2 (not included here)

• interphalangeal subluxation and dislocation of thumb (S63.1-)

Code annotations containing back-references to S63.042A

Back-references to S63.04

• Type 2 Excludes: S63.05 Subluxation and dislocation of other carpometacarpal joint ("subluxation and dislocation of carpometacarpal joint of thumb (S63.04-)")

Back-references to S63

• Type 2 Excludes: S66 Injury of muscle, fascia and tendon at wrist and hand level ("sprain of joints and ligaments of wrist and hand (S63.-)")

Nearby codes

• S63.041 Subluxation of carpometacarpal joint of right thumb
• S63.041A Subluxation of carpometacarpal joint of right thumb, initial encounter
• S63.041D Subluxation of carpometacarpal joint of right thumb, subsequent encounter
• S63.041S Subluxation of carpometacarpal joint of right thumb, sequela
• S63.042 Subluxation of carpometacarpal joint of left thumb
• S63.042A Subluxation of carpometacarpal joint of left thumb, initial encounter (this code)
• S63.042D Subluxation of carpometacarpal joint of left thumb, subsequent encounter
• S63.042S Subluxation of carpometacarpal joint of left thumb, sequela
• S63.043 Subluxation of carpometacarpal joint of unspecified thumb
• S63.043A Subluxation of carpometacarpal joint of unspecified thumb, initial encounter
• S63.043D Subluxation of carpometacarpal joint of unspecified thumb, subsequent encounter