CPT® Code 83070

Hemosiderin is a complex protein that contains iron and is typically found within cells, particularly in macrophages, which are a type of immune cell. This protein serves as an important marker for intravascular hemorrhage, indicating that there has been bleeding within the blood vessels. When there is an increase in free hemoglobin levels in the bloodstream, the kidneys respond by attempting to excrete this excess hemoglobin. As a result, hemosiderin can appear in the urine, which is a significant finding in various clinical scenarios. To detect the presence of hemosiderin, a random urine sample or a first morning voided specimen is collected. A qualitative test is then conducted, often utilizing methodologies such as a semi-quantitative microscopic stain, to ascertain whether hemosiderin is present in the urine. This testing is crucial for diagnosing conditions related to bleeding and iron metabolism, providing valuable information for further medical evaluation and management.