S90.413S Abrasion, unspecified great toe, sequela

Name of the Condition

• Abrasion, unspecified great toe, sequela (ICD-10 code: S90.413S)

Summary

An abrasion of the unspecified great toe, sequela, refers to a residual or chronic condition resulting from a prior abrasion injury to the largest toe. This sequela represents the long-term effects of the initial injury, which may include persistent skin changes, scarring, or functional limitations. The condition is characterized by the aftermath of the original trauma, rather than an active acute injury.

Causes

The sequela arises from a previous abrasion to the great toe, typically caused by friction, minor trauma, or contact with rough surfaces. The residual effects may persist due to incomplete healing, infection, or tissue damage from the initial event.

Risk Factors

• History of prior toe abrasions or injuries.
• Delayed or inadequate treatment of the original abrasion.
• Underlying conditions affecting skin healing, such as diabetes or vascular disease.

Symptoms

• Persistent redness, discoloration, or scarring on the great toe.
• Altered skin texture or sensitivity at the site.
• Mild pain or discomfort during activity or pressure.

Diagnosis

Physical examination to assess residual skin changes, scarring, or functional impairment. Review of the patient's medical history to confirm a prior abrasion and evaluate the timeline of healing. No additional diagnostic tests are typically required unless complications are suspected.

Treatment Options

• Topical treatments to manage scar tissue or skin sensitivity.
• Protective measures, such as padding or footwear modifications, to reduce irritation.
• Referral to a specialist if functional limitations or chronic pain are present.

Prognosis and Follow-Up

Most sequela cases are stable and do not worsen over time. Follow-up may be recommended to monitor for changes in symptoms or the development of complications. Long-term outcomes depend on the severity of the initial injury and individual healing factors.

Complications

• Chronic pain or discomfort.
• Persistent scarring or skin discoloration.
• Increased risk of reinjury due to altered tissue integrity.

Lifestyle & Prevention

• Wear properly fitting shoes to reduce friction and pressure.
• Use protective gear during activities that may impact the toe.
• Maintain good foot hygiene to support overall skin health.

When to Seek Professional Help

Seek care if symptoms worsen, new pain or swelling develops, or if there are signs of infection, such as increased redness, pus, or fever.

Tips for Medical Coders

Document the sequela status clearly, including the timeline since the original abrasion and any residual effects. Ensure the code S90.413S is used only when the condition is a direct result of a prior abrasion and is no longer in the acute phase.