CPT® Code 78270

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The Vitamin B-12 absorption study, identified by CPT® Code 78270, is a laboratory test designed to assess the body's ability to absorb Vitamin B-12, also known as cobalamin. This vitamin plays a crucial role in several vital physiological processes, including the production of red blood cells (RBCs), the replication of DNA and RNA for cellular development, and the proper functioning of the nervous system. The test is particularly significant in the evaluation of patients suspected of having pernicious anemia, a condition characterized by the inability to absorb Vitamin B-12 due to a lack of intrinsic factor, a protein necessary for absorption. The procedure involves administering an oral dose of Vitamin B-12 that is labeled with a radioactive isotope, such as Cobalt 57 or Cobalt 58, to track its absorption. Following the oral administration, a 24-hour urine collection is initiated to measure the amount of labeled Vitamin B-12 excreted, which indicates how much has been absorbed by the gastrointestinal tract. This test is part of a series of assessments, including Stage II and dual isotope tests, which further evaluate absorption issues and help differentiate between various underlying conditions affecting Vitamin B-12 absorption.