73090

Radiologic examination, forearm, 2 views

Radiologic examination of the forearm (CPT 73090) is a diagnostic imaging procedure used to evaluate the radius and ulna, which are the two long bones extending from the elbow to the wrist. This procedure typically involves two orthogonal views: the anteroposterior (AP) view and the lateral view. These views allow the radiologist to visualize the bony structures in two different planes, ensuring a comprehensive assessment of any abnormalities. The forearm X-ray is vital for diagnosing fractures, dislocations, or degenerative changes in patients presenting with pain, swelling, or limited range of motion following trauma or secondary to chronic conditions. During the AP view, the patient's arm is fully extended with the palm facing upward, ensuring the entire length of the forearm, including both the elbow and wrist joints, is captured. This view is excellent for assessing the alignment of the radius and ulna and identifying any bowing or displacement. The lateral view is obtained by flexing the elbow to a 90-degree angle and positioning the forearm on its side. This perspective is crucial for detecting subtle fractures, assessing posterior or anterior displacement of bone fragments, and evaluating the relationship of the radius and ulna at the proximal and distal radioulnar joints. The procedure is non-invasive, utilizes a low dose of ionizing radiation, and is a first-line diagnostic tool in orthopedic and emergency medicine. It provides critical information for determining the need for immobilization, surgical intervention, or further advanced imaging like CT or MRI. Proper positioning is essential to avoid foreshortening of the bones and to ensure that the joints at both ends of the forearm are visible, as injuries to one area can often be associated with secondary injuries at the adjacent joint.

Clinical Indications

  • Acute trauma or suspected fracture of the radius or ulna
  • Localized pain, swelling, or deformity in the forearm
  • Evaluation of suspected osteomyelitis or other bone infections
  • Monitoring the healing process of a known fracture
  • Assessment for primary or metastatic bone tumors
  • Detection of foreign bodies in the soft tissues of the forearm
  • Evaluation of congenital forearm deformities
  • Investigation of palpable masses or unexplained bone pain
  • Follow-up after surgical hardware placement or internal fixation
  • Assessment of skeletal maturity in pediatric patients

Procedure Steps

  1. Verify patient identity and confirm the specific side (left or right) for the examination.
  2. Instruct the patient to remove any jewelry or metallic items from the arm to prevent imaging artifacts.
  3. Position the patient either seated or lying down next to the X-ray table.
  4. For the AP view, place the forearm on the image receptor with the palm up and the elbow extended.
  5. Align the central ray perpendicular to the midpoint of the forearm.
  6. Ensure both the elbow and wrist joints are included on the image.
  7. For the lateral view, flex the elbow to 90 degrees and place the forearm in a lateral position on the image receptor.
  8. Instruct the patient to remain perfectly still to prevent motion blur.
  9. Capture the radiographic images using the appropriate exposure settings (kVp and mAs).
  10. Review the images for technical quality and ensure both the radius and ulna are clearly visible in two planes.

Coding Guidelines

  • Report 73090 for a standard two-view study of the forearm.
  • If only one view is performed, use the code with modifier 52 (Reduced Services), as there is no specific code for a single-view forearm X-ray.
  • If more than two views are performed, code 73090 still applies as it is the comprehensive code for the forearm, though some payers may allow modifier 22 in extreme cases.
  • The forearm includes the shaft of the radius and ulna; if the focus is strictly on the wrist, use 73100-73110; if on the elbow, use 73070-73080.
  • Modifier 26 (Professional Component) should be used if the physician is only providing the interpretation.
  • Modifier TC (Technical Component) should be used if only the equipment and technical staff services are being billed.
  • If performed bilaterally, append modifier 50 or use RT/LT modifiers depending on payer requirements.

Associated ICD-10 Codes