S72.135M Nondisplaced apophyseal fracture of left femur, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Nondisplaced apophyseal fracture of left femur, subsequent encounter for open fracture type I or II with nonunion

Summary

A nondisplaced apophyseal fracture of the left femur is a break in the apophysis, a bony growth area on the femur where tendons or ligaments attach, with the bone fragments remaining in their normal anatomical position. This fracture is classified as an open fracture type I or II, indicating a break in the skin with minimal contamination or a larger wound with moderate contamination, respectively. The condition is further specified as a subsequent encounter, meaning it is a follow-up visit for treatment of the fracture, and includes nonunion, where the fracture has failed to heal properly.

Causes

Apophyseal fractures commonly result from direct trauma, such as falls or high-impact injuries, particularly in adolescents during growth spurts. They can also occur from repetitive stress, such as in athletes engaged in activities like running or jumping. Open fractures may result from trauma that penetrates the skin, exposing the fracture site. Nonunion can develop due to inadequate immobilization, poor blood supply to the fracture site, infection, or other factors that impede healing.

Risk Factors

• Adolescence, especially during periods of rapid growth.
• Participation in high-impact sports or activities.
• History of previous injuries to the hip or thigh.
• Underlying bone conditions that weaken the apophysis.
• Trauma involving skin penetration, increasing the risk of open fractures.
• Factors that impair healing, such as smoking, diabetes, or nutritional deficiencies.

Symptoms

• Localized pain at the hip or thigh, often worsened by movement or pressure.
• Swelling, tenderness, or bruising around the affected area.
• Difficulty bearing weight on the leg.
• Possible limping or altered gait.
• Persistent pain or instability at the fracture site, indicating nonunion.
• Signs of infection, such as redness, warmth, or drainage, if the fracture is open.

Diagnosis

Physical examination to assess pain, swelling, and tenderness. Imaging studies, including X-rays or MRI, to confirm the fracture, evaluate displacement, and assess for nonunion. Assessment of the skin for open wounds and classification of the fracture type (I or II). Evaluation of healing progress during subsequent encounters to determine if nonunion is present.

Treatment Options

• Immobilization with a cast or brace to stabilize the fracture and promote healing.
• Surgical intervention, such as internal fixation, if nonunion is present or the fracture requires stabilization.
• Wound care for open fractures to prevent infection.
• Pain management with medications or other therapies.
• Physical therapy to restore strength and mobility once healing progresses.
• Monitoring for signs of infection or complications during follow-up visits.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the presence of nonunion, and the effectiveness of treatment. Most nondisplaced fractures heal with proper immobilization, but nonunion may require additional intervention. Follow-up visits are necessary to monitor healing, assess for complications, and adjust treatment as needed. Long-term outcomes may include full recovery with restored function or residual pain or mobility issues if nonunion persists.

Complications

• Nonunion, where the fracture fails to heal properly.
• Infection, particularly with open fractures.
• Delayed healing or malunion, where the bone heals in an incorrect position.
• Chronic pain or instability at the fracture site.
• Limited mobility or functional impairment.
• Nerve or vascular damage, though rare with apophyseal fractures.

Lifestyle & Prevention

• Avoid high-impact activities that increase fracture risk until fully healed.
• Use proper protective equipment during sports or activities.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs bone healing.
• Follow medical advice for immobilization and weight-bearing restrictions.
• Attend all follow-up appointments to monitor healing progress.

When to Seek Professional Help

• Persistent or worsening pain, swelling, or bruising.
• Signs of infection, such as redness, warmth, or drainage.
• Difficulty bearing weight or walking.
• New or worsening deformity at the fracture site.
• Lack of improvement in symptoms after initial treatment.
• Concerns about nonunion or delayed healing.

Tips for Medical Coders

Document the laterality (left femur), the fracture type (open type I or II), the encounter type (subsequent), and the presence of nonunion. Ensure clinical documentation supports the classification of the fracture as open and the determination of nonunion. Code S72.135M is specific to a subsequent encounter for an open fracture type I or II with nonunion of the left femur.