S93.32 Subluxation and dislocation of tarsometatarsal joint

Name of the Condition

• Subluxation and dislocation of tarsometatarsal joint

Summary

This condition involves partial or complete displacement of the tarsometatarsal joint, which connects the tarsal bones to the metatarsal bones in the midfoot. Subluxation refers to a partial misalignment, while dislocation is a complete separation of joint surfaces. These injuries often result in pain, instability, and impaired function, particularly during weight-bearing activities.

Causes

Trauma, such as falls, sports injuries, or direct impacts to the foot, is the primary cause. Twisting or rotational forces applied to the foot can lead to joint displacement. High-impact events or sudden movements may also result in subluxation or dislocation of the tarsometatarsal joint.

Risk Factors

• Participation in high-impact sports or activities with sudden directional changes.
• Previous foot injuries or joint instability.
• Wearing footwear that lacks proper support or stability.
• Uneven terrain or poor surface conditions.

Symptoms

• Pain and swelling in the midfoot area.
• Inability to bear weight or walk normally.
• Visible deformity or misalignment of the foot.
• Bruising or discoloration around the injured joint.
• Tenderness to touch or pressure.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and joint stability. Imaging tests, such as X-rays, are used to confirm the extent of displacement and rule out fractures. CT or MRI may be used to evaluate soft tissue or ligament damage.

Treatment Options

Initial treatment focuses on immobilization of the foot with a cast or boot, rest, ice, compression, and elevation (R.I.C.E). Severe cases may require surgical intervention to realign and stabilize the joint.

Prognosis and Follow-Up

With appropriate treatment, patients can expect improvement, though recovery may take several months. Follow-up care often includes physical therapy to restore strength and mobility.

Complications

Potential complications include chronic pain, arthritis, nerve damage, or long-term instability of the joint.

Lifestyle & Prevention

• Wear supportive footwear during activities.
• Avoid uneven surfaces or high-impact movements that strain the foot.
• Strengthen foot and ankle muscles through targeted exercises.
• Address any underlying foot deformities or instability promptly.

When to Seek Professional Help

Seek medical attention if you experience severe pain, swelling, or deformity after a foot injury, or if you cannot bear weight on the affected foot.

Tips for Medical Coders

Document the specific joint involved (tarsometatarsal), the nature of the injury (subluxation or dislocation), and any associated details such as laterality or encounter type. Ensure clinical documentation supports the diagnosis and aligns with the code's definition.