CPT® Code 89060

The CPT® Code 89060 refers to a laboratory procedure known as crystal identification by light microscopy, which may include the use of polarizing lens analysis. This procedure is utilized to detect and identify crystals present in various body fluids or tissues, excluding urine. The identification of these crystals is significant as it can indicate underlying conditions such as crystal-induced arthropathy or pseudo-gout, particularly in patients exhibiting symptoms of articular or periarticular inflammation, erosion, or destruction. The procedure primarily focuses on identifying common types of crystals, including calcium pyrophosphate dihydrate (CPPD), monosodium urate (MSU), and cholesterol crystals. The use of polarized light microscopy enhances the visualization of these crystals, allowing for a more accurate assessment of their characteristics. For instance, cholesterol crystals are identifiable as bright square or rectangular plates, while CPPD crystals are characterized by their weak birefringence and rhomboidal shape. When viewed under polarized light, CPPD crystals exhibit distinct colors, appearing either blue or yellow. MSU crystals, which are needle-shaped and strongly double refractive, can be found within leukocytes or freely circulating in the fluid or tissue. Under a polarizing filter, MSU crystals display yellow or blue hues, aiding in the determination of their mineral composition. This detailed analysis is crucial for diagnosing and managing conditions associated with crystal formation in the body.