ICD-10-CM Billable Code

S52.21

Greenstick fracture of shaft of ulna

Clinical Classification Guidelines

7th Character Definition

The appropriate 7th character is to be added to all codes in subcategory S52.21

Medical Intelligence & Overview

A greenstick fracture of the shaft of the ulna is a common injury, especially in children. It occurs when a bone bends and cracks, but does not break completely — similar to how a green twig breaks. This type of fracture affects the ulna, one of the two long bones in the forearm, and usually results from a fall or direct blow. Understanding this injury can help patients and caregivers recognize symptoms and seek appropriate care.

Causes & Symptoms

Clinical Causes: Falls onto an outstretched arm Direct trauma or blow to the forearm Accidents during sports or physical activities Twisting or bending the arm forcefully High-impact injuries, such as car accidents (less common)

Key Symptoms: Pain and tenderness along the forearm Swelling or bruising around the injured area Difficulty moving or using the wrist and hand Deformity or unnatural bend in the forearm (may be less apparent) Sensitivity to touch in the affected region

Diagnostic & Treatment

Diagnosis Path: Diagnosis is primarily made through physical examination and confirmed with X-rays. The doctor will assess arm alignment, swelling, and pain response, then review imaging to determine the location and extent of the fracture. Greenstick fractures may sometimes be mistaken for other types of injuries; hence, imaging is crucial for accurate diagnosis.

Treatment Protocols: Treatment generally involves immobilization and careful management to allow the bone to heal properly. Common approaches include:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Clinical Advice & FAQs

Billing Guidance

Is S52.21 a billable ICD-10 code?
Yes, S52.21 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.

Documentation

How do I report S52.21?
Clinical documentation must specify the nature of Greenstick fracture of shaft of ulna and any associated comorbidities for accurate reporting.

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