S52.136M Nondisplaced fracture of neck of unspecified radius, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Nondisplaced fracture of neck of unspecified radius, subsequent encounter for open fracture type I or II with nonunion
• Medical term: S52.136M

Summary

A nondisplaced fracture of the neck of the unspecified radius is a break in the radius bone near the wrist where the bone fragments remain in their normal alignment. This code represents a subsequent encounter for an open fracture type I or II with nonunion, meaning the fracture has not healed properly after previous treatment, and the skin was breached during the injury (type I: clean wound <1 cm; type II: larger or contaminated wound).

Causes

This fracture typically results from trauma to the forearm, such as falls onto an outstretched hand, direct blows, or accidents that force the radius to bear excessive load. Open fractures occur when the broken bone pierces the skin or when external forces cause a wound at the fracture site. Nonunion may develop due to inadequate immobilization, poor blood supply, infection, or other factors that impede healing.

Risk Factors

• Osteoporosis or weakened bone density
• High-impact activities or sports with fall risks
• Advanced age, which may reduce bone resilience
• Previous fractures or bone health conditions
• Inadequate initial treatment or immobilization
• Infection at the fracture site

Symptoms

• Persistent pain at the fracture site
• Swelling and tenderness in the forearm or wrist
• Possible open wound (for type I or II)
• Limited range of motion in the affected arm
• Visible or palpable gap at the fracture site (nonunion)

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion. Imaging tests, such as X-rays, are used to confirm the fracture and evaluate alignment. Additional scans like CT or MRI may be ordered to assess bone healing and soft tissue damage. Documentation must specify the open fracture type (I or II) and the presence of nonunion.

Treatment Options

• Pain management with medications such as NSAIDs
• Surgical intervention to promote healing (e.g., bone grafting, fixation)
• Immobilization with a cast or splint to stabilize the fracture
• Antibiotics for open fractures to prevent infection
• Physical therapy to restore mobility and strength

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the success of treatment. Follow-up imaging is typically required to monitor healing. Long-term outcomes may include persistent pain or limited function if healing is incomplete. Regular monitoring by an orthopedic specialist is recommended.

Complications

• Nonunion or delayed healing
• Infection (especially with open fractures)
• Arthritis or joint stiffness
• Nerve or blood vessel damage
• Chronic pain or disability

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use protective gear during sports or activities with fall risks
• Maintain bone health through diet and exercise
• Follow post-treatment instructions carefully to support healing

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe pain, swelling, or deformity
• Open wound at the fracture site
• Numbness, tingling, or loss of circulation
• Inability to move the arm or wrist

Tips for Medical Coders

This code (S52.136M) requires documentation of the fracture type (open I or II), the presence of nonunion, and that it is a subsequent encounter. Ensure the medical record specifies the fracture's alignment (nondisplaced), the wound characteristics (type I or II), and the nonunion status. Coding should reflect the current encounter type and any complications affecting treatment.