S43.223A Posterior subluxation of unspecified sternoclavicular joint, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S43.223 with 7th character A (initial encounter).

Applies from S43 Dislocation and sprain of joints and ligaments of shoulder girdle

Includes

• avulsion of joint or ligament of shoulder girdle
• laceration of cartilage, joint or ligament of shoulder girdle
• sprain of cartilage, joint or ligament of shoulder girdle
• traumatic hemarthrosis of joint or ligament of shoulder girdle
• traumatic rupture of joint or ligament of shoulder girdle
• traumatic subluxation of joint or ligament of shoulder girdle
• traumatic tear of joint or ligament of shoulder girdle

Excludes2 (not included here)

• strain of muscle, fascia and tendon of shoulder and upper arm (S46.-)

Code also

• any associated open wound

7th character note

• The appropriate 7th character is to be added to each code from category S43

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 S43.223A

Back-references to S43.2

• Type 2 Excludes: S23 Dislocation and sprain of joints and ligaments of thorax ("dislocation, sprain of sternoclavicular joint (S43.2, S43.6)")

Nearby codes

• S43.222 Posterior subluxation of left sternoclavicular joint
• S43.222A Posterior subluxation of left sternoclavicular joint, initial encounter
• S43.222D Posterior subluxation of left sternoclavicular joint, subsequent encounter
• S43.222S Posterior subluxation of left sternoclavicular joint, sequela
• S43.223 Posterior subluxation of unspecified sternoclavicular joint
• S43.223A Posterior subluxation of unspecified sternoclavicular joint, initial encounter (this code)
• S43.223D Posterior subluxation of unspecified sternoclavicular joint, subsequent encounter
• S43.223S Posterior subluxation of unspecified sternoclavicular joint, sequela
• S43.224 Posterior dislocation of right sternoclavicular joint
• S43.224A Posterior dislocation of right sternoclavicular joint, initial encounter
• S43.224D Posterior dislocation of right sternoclavicular joint, subsequent encounter