Who Is Liable When an Ankle Fracture Is Misdiagnosed?

Recent Trends in Diagnostic Error Claims

Over the past several years, legal analysts have observed a steady rise in medical malpractice claims linked to missed or delayed fracture diagnoses in emergency departments and urgent-care settings. Among lower-extremity injuries, ankle fractures are a frequent subject of these disputes, partly because swelling can mask subtle breaks and because non-specialist clinicians may rely on incomplete imaging. The growing use of telemedicine and midlevel providers has added new dimensions to liability questions, as protocols for referral and follow-up vary widely across practices.

Background: How Misdiagnosis Occurs

Ankle fractures are commonly missed when initial X-rays are interpreted as simple sprains, when radiographic views do not capture the full joint, or when an avulsion fracture is overlooked. Contributing factors include hasty examinations, lack of orthopedic consultation, and failure to order advanced imaging such as CT or MRI when clinical suspicion persists. The standard of care typically requires a thorough physical exam, adequate imaging, and a clear discharge plan that includes cautionary instructions for symptoms that warrant a return visit.

Key Liability Questions for Patients

• Who performed the exam and read the images? Liability may fall on the treating physician, the radiologist, or both, depending on who interpreted the original films.
• Were established protocols followed? A deviation from standard diagnostic algorithms—such as the Ottawa Ankle Rules—can shift liability toward the provider or institution.
• Did delayed diagnosis cause measurable harm? A plaintiff must typically show that a correct initial diagnosis would have changed the outcome, such as avoiding surgery or reducing recovery time.
• Was the facility responsible for supervision? In cases where a nurse practitioner or physician assistant misdiagnosed the fracture, the supervising physician or the hospital may share liability.

Likely Impact on Patients and Providers

For patients, a misdiagnosis can lead to prolonged pain, improper weight-bearing that displaces a fracture, avascular necrosis, or chronic arthritis within the ankle joint. Surgical repair may become more complex, and time away from work or daily activities often increases. For providers, the repercussions include malpractice litigation, increased insurance premiums, and potential reputation damage. Many emergency departments have responded by revising imaging protocols and requiring mandatory follow-up referrals for any ankle injury that presents with localized tenderness or swelling.

What to Watch Next

• Expansion of telemedicine liability: As more ankle injuries are assessed remotely, watch for legal tests of whether telemedicine platforms bear responsibility for insufficient guidance on imaging or referral.
• State-level rule changes: Several state legislatures are reviewing medical malpractice caps and standards for emergency care; changes could affect settlement values and filing patterns in misdiagnosis cases.
• Use of AI-assisted imaging tools: If artificial intelligence flags potential fractures missed by human readers, courts may examine whether reliance on such tools reduces or transfers liability.
• Shifts in documentation expectations: Greater emphasis on real-time documentation of clinical reasoning may become a protective measure for providers, potentially altering how negligence is established.