S42.145K Nondisplaced fracture of glenoid cavity of scapula, left shoulder, subsequent encounter for fracture with nonunion

Name of the Condition

• Nondisplaced fracture of glenoid cavity of scapula, left shoulder, subsequent encounter for fracture with nonunion

Summary

A nondisplaced fracture of the glenoid cavity of the scapula, left shoulder, refers to a break in the socket portion of the shoulder blade that articulates with the humerus, where the bone fragments remain in their normal anatomical position. This condition involves damage to the glenoid, a shallow, concave structure critical for shoulder joint stability. The "subsequent encounter" indicates this is a follow-up visit for the fracture, and "nonunion" specifies that the fracture has failed to heal properly within the expected timeframe. Nondisplaced fractures typically preserve joint alignment, but nonunion may require additional intervention to promote healing.

Causes

Traumatic injury is the primary cause of glenoid cavity fractures. Common mechanisms include falls onto an outstretched arm, direct blows to the shoulder, or high-impact events such as motor vehicle accidents. Sports-related collisions or forceful impacts during physical activities may also result in this type of fracture. The left shoulder is often affected due to its exposure in certain injury scenarios. Nonunion may occur due to inadequate immobilization, poor blood supply to the fracture site, or underlying health conditions that impair bone healing.

Risk Factors

• Participation in contact sports or activities with a high risk of falls.
• Osteoporosis or other bone-weakening conditions.
• Advanced age, which may increase susceptibility to fractures from minor trauma.
• Previous shoulder injuries that affect bone integrity.
• Smoking or other lifestyle factors that impair bone healing.
• Certain medical conditions, such as diabetes or vascular disease, that reduce healing capacity.

Symptoms

• Persistent pain in the shoulder or upper back, especially with movement.
• Swelling, bruising, or tenderness around the shoulder joint.
• Limited range of motion or stiffness in the shoulder.
• A noticeable gap or abnormal movement at the fracture site (in some cases).
• Difficulty bearing weight on the affected arm.

Diagnosis

Diagnosis typically involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays, CT scans, or MRI, are used to confirm the fracture and evaluate for nonunion. X-rays may show a persistent fracture line without signs of healing, while CT scans provide detailed images of the bone structure. MRI can assess soft tissue involvement and blood supply to the fracture site. The healthcare provider will also review the patient’s medical history and previous treatment to determine the cause of nonunion.

Treatment Options

Treatment depends on the severity of the nonunion and the patient’s overall health. Options may include:

• Immobilization with a sling or brace to stabilize the shoulder.
• Physical therapy to improve range of motion and strength.
• Surgical intervention, such as bone grafting, internal fixation, or joint replacement, to promote healing.
• Medications to manage pain and inflammation.
• Lifestyle modifications, such as smoking cessation, to support bone healing.

Prognosis and Follow-Up

The prognosis for a nondisplaced glenoid fracture with nonunion varies. With appropriate treatment, many patients achieve successful healing and restored function. However, nonunion may lead to chronic pain, reduced mobility, or arthritis in the shoulder joint. Follow-up care is essential to monitor healing progress, adjust treatment as needed, and address any complications. Regular imaging and physical examinations help assess recovery and guide long-term management.

Complications

• Chronic pain or discomfort in the shoulder.
• Reduced range of motion or stiffness.
• Arthritis or joint degeneration due to persistent instability.
• Infection (if surgical intervention is required).
• Nerve or blood vessel damage near the fracture site.
• Difficulty returning to normal activities or sports.

Lifestyle & Prevention

• Avoid high-impact activities or contact sports until cleared by a healthcare provider.
• Use proper protective gear during activities that pose a risk of shoulder injury.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Engage in regular, low-impact exercise to strengthen shoulder muscles and improve flexibility.
• Quit smoking or avoid excessive alcohol consumption, as these can impair bone healing.
• Follow post-injury care instructions, including immobilization and physical therapy, to promote proper healing.

When to Seek Professional Help

Seek medical attention if you experience:

• Severe or worsening pain in the shoulder or upper back.
• Swelling, bruising, or deformity that does not improve.
• Inability to move the shoulder or bear weight on the affected arm.
• Signs of infection, such as fever, redness, or drainage from the injury site.
• Persistent symptoms after initial treatment, indicating possible nonunion.

Tips for Medical Coders

When coding for S42.145K, ensure documentation supports the "subsequent encounter" and "nonunion" criteria. The code is specific to the left shoulder and requires confirmation of a nondisplaced glenoid cavity fracture with evidence of failed healing. Document the encounter type (subsequent) and the presence of nonunion clearly in the medical record. Verify that no other codes are needed for related conditions, such as complications or additional injuries. Accurate documentation is essential to reflect the patient’s current status and guide appropriate care.