HCPCS 29870

Arthroscopy, knee, diagnostic, with or without synovial biopsy (separate procedure)

AI EXPLANATION: A diagnostic knee arthroscopy is an outpatient procedure used to examine the interior of the knee joint. A physician makes small incisions and inserts a thin tube equipped with a tiny camera and light, known as an arthroscope, to inspect the cartilage, ligaments, and bone surfaces. During the examination, a small tissue sample from the joint lining may also be taken for testing to help identify causes of persistent knee pain, swelling, or instability.