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S43.4 – Sprain of the Shoulder Joint

S43.4 is the ICD-10 code for a sprain or strain of the shoulder joint. It describes injuries to the ligaments and soft tissues around the shoulder without a bone fracture.

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Things worth knowing about "S43.4"

S43.4 is the ICD-10 code for a sprain or strain of the shoulder joint. It describes injuries to the ligaments and soft tissues around the shoulder without a bone fracture.

What Does ICD-10 Code S43.4 Mean?

The ICD-10 code S43.4 refers to a sprain and strain of the shoulder joint. This code is used in medical documentation to classify injuries to the ligaments, tendons, and soft tissues of the shoulder joint that occur without a bone fracture. The shoulder is one of the most mobile joints in the human body, making it particularly susceptible to this type of injury.

Causes

A sprain or strain of the shoulder joint (S43.4) can be caused by a variety of events:

Falls onto an outstretched hand or directly onto the shoulder
Sports injuries in handball, volleyball, tennis, or other sports involving intense arm movements
Direct impact to the shoulder, for example during a collision
Overuse from repetitive movements in daily life or at work
Traffic accidents with sudden force applied to the shoulder girdle

Symptoms

Typical complaints associated with a shoulder joint sprain (S43.4) include:

Pain in the shoulder area that worsens with movement
Swelling and possible bruising around the shoulder joint
Restricted range of motion, especially when lifting or rotating the arm
Tenderness on palpation of the affected joint
Muscle tension in the shoulder and neck region as a protective response

Diagnosis

Diagnosis of a shoulder joint sprain is typically made through:

Physical examination: The physician assesses mobility, stability, and tenderness of the shoulder.
X-ray: To rule out a fracture or dislocation.
Ultrasound (sonography): To evaluate ligaments and tendons.
MRI (Magnetic Resonance Imaging): If more serious soft tissue damage or tears are suspected.

Treatment

Treatment depends on the severity of the injury. Mild to moderate cases (S43.4) are generally managed conservatively:

Immediate First Aid (RICE Protocol)

Rest: Relieve the injured shoulder from load-bearing
Ice: Apply cold packs to reduce pain and swelling (never directly on the skin)
Compression: Light compression bandage for stabilization
Elevation: Keep the arm elevated to promote circulation

Further Treatment

Pain medication: Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen to relieve pain and inflammation
Immobilization: Short-term use of a sling or brace
Physiotherapy: Targeted exercises to restore range of motion, strength, and stability
Manual therapy: Mobilization techniques performed by physiotherapists
Surgical treatment: Required only in rare, severe cases involving complete ligament rupture

Prognosis and Recovery Time

With appropriate treatment, most shoulder joint sprains (S43.4) heal completely within 2 to 8 weeks. More severe injuries with partial tears may take longer. Early physiotherapy significantly improves recovery outcomes and helps prevent chronic complaints.

References

World Health Organization (WHO): ICD-10 International Classification of Diseases, 10th Revision, Chapter XIX – Injury, Poisoning, S43.4 Sprain and Strain of Shoulder Joint, Geneva, 2019.
Brukner, P. & Khan, K.: Clinical Sports Medicine, 5th Edition, McGraw-Hill Education, 2017.
Rockwood, C.A. et al.: Rockwood and Matsen's The Shoulder, 5th Edition, Elsevier Saunders, 2016.

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