S42.014K Posterior displaced fracture of sternal end of right clavicle, subsequent encounter for fracture with nonunion

Name of the Condition

• Posterior displaced fracture of sternal end of right clavicle, subsequent encounter for fracture with nonunion (ICD-10 Code: S42.014K)

Summary

This condition involves a break at the sternal (chest) end of the right clavicle, with the bone fragment displaced backward. The clavicle, or collarbone, connects the arm to the body and is a common site for fractures due to its exposed position. Displacement indicates the bone fragments are not aligned, which may affect healing and require specific management. The "subsequent encounter" specifies this is a follow-up visit for a fracture that has not healed properly (nonunion), meaning the bone fragments have failed to fuse after an expected healing period.

Causes

Fractures of the clavicle’s sternal end typically result from direct trauma to the shoulder or chest, such as a fall onto the shoulder, a blow to the chest, or a motor vehicle accident. The posterior displacement specifically occurs when the fracture fragment moves toward the back of the body. Nonunion may develop due to inadequate immobilization, poor blood supply to the bone, infection, or excessive movement at the fracture site during healing.

Risk Factors

Factors increasing the risk include participation in contact sports, osteoporosis or reduced bone density, and activities with a high risk of falls or collisions. Older adults may be more susceptible due to age-related bone changes. Nonunion risk is higher in cases of severe displacement, open fractures, or delayed treatment.

Symptoms

Symptoms often include persistent pain at the sternal end of the right clavicle, swelling, and tenderness. A visible or palpable deformity may be present, along with difficulty moving the shoulder or arm due to pain. Unlike acute fractures, symptoms may persist beyond the typical healing timeline, indicating potential nonunion.

Diagnosis

Diagnosis begins with a physical examination to assess pain, swelling, and deformity. X-rays or CT scans are used to confirm the fracture and evaluate bone alignment and healing progress. Nonunion is diagnosed when imaging shows a persistent gap between bone fragments with no signs of healing after an expected period (usually 3–6 months).

Treatment Options

Treatment may include immobilization with a sling or brace to stabilize the fracture, physical therapy to restore mobility and strength, or surgical intervention (e.g., bone grafting, internal fixation) to promote healing. Pain management and activity modification are often part of the plan.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture and response to treatment. Nonunion may require extended follow-up, with regular imaging to monitor healing. Most patients achieve functional recovery, but some may experience long-term pain or limited shoulder movement.

Complications

Complications can include chronic pain, limited range of motion, nerve or blood vessel damage near the fracture site, or infection (if surgery is performed). Nonunion increases the risk of these issues if left untreated.

Lifestyle & Prevention

Preventive measures include using protective gear during sports, maintaining bone health through diet and exercise, and avoiding high-risk activities. For those with a history of clavicle fractures, gradual return to activity under medical guidance is recommended.

When to Seek Professional Help

Seek care if pain persists beyond the expected healing time, if swelling or deformity worsens, or if there are signs of infection (e.g., redness, fever). Sudden increases in pain or new numbness/tingling may indicate nerve involvement.

Tips for Medical Coders

Document the encounter as a "subsequent" visit for a fracture with nonunion. Ensure clinical notes specify the nonunion diagnosis and any treatments provided. The code S42.014K is used when the fracture has not healed and the patient is receiving follow-up care.