Q: Using the ICD-10-CM guidelines for the seventh character extensions for fracture codes, how should I identify each of the following? Avascular necrosis following fracture Cast change or removal Emergency treatment Evaluation and management by a new physician Follow-up visits following fracture treatment Infection on open fracture site Malunion of fracture Nonunion of fracture Medication adjustment Patient delayed seeking treatment for the fracture or nonunion Removal of external of internal fixation device Surgical treatment