CPT® Code 85291

The CPT® Code 85291 refers to a laboratory test that screens for the solubility of clotting factor XIII, also known as fibrin stabilizing factor. This factor plays a crucial role in the preservation of blood clots, wound healing, and overall tissue repair. A deficiency in factor XIII can lead to significant clinical issues, including defects in fibrin cross-linking, which may result in early spontaneous miscarriages or heavy menstrual bleeding in women. In infants, a deficiency can cause bleeding from the umbilical stump, while in children, it may lead to central nervous system bleeding following minor head trauma or even spontaneously in adults. Additionally, individuals with factor XIII deficiency may experience bruising and soft tissue bleeding, particularly in the gums, muscles, and joints. The deficiency is often attributed to a rare inherited genetic disorder, although it can also arise from the development of auto-antibodies triggered by certain medications, such as isoniazid. The qualitative test represented by this code is typically ordered as an initial screening tool for factor XIII deficiency. If the screening yields positive results, a follow-up quantitative test, identified by CPT® Code 85290, is recommended for further evaluation. The test is performed on a blood sample obtained through venipuncture, and the analysis is conducted on platelet-poor plasma to assess its qualitative solubility.