CPT® Code 82306

The CPT® Code 82306 refers to the laboratory test for measuring the levels of 25-hydroxyvitamin D in the blood, which is crucial for assessing vitamin D status in patients. This test is particularly important for determining whether a deficiency in vitamin D or an abnormal metabolism of calcium is contributing to conditions such as bone weakness or malformation. Vitamin D is classified as a fat-soluble vitamin, meaning it is absorbed from the intestine in a manner similar to fats. The measurement of 25-hydroxyvitamin D is essential in various clinical scenarios, especially in individuals with conditions that impair fat absorption, such as cystic fibrosis or Crohn's disease, as well as in patients who have undergone gastric bypass surgery, where nutrient absorption may be compromised. To perform this test, a blood sample is collected from the patient. The laboratory then evaluates the levels of both 25-hydroxyvitamin D3 and 25-hydroxyvitamin D2 using a method known as chemiluminescent immunoassay. The results of this test may provide a total value that represents the sum of vitamin D3 and D2, or they may include specific fractions of D3 and D2, along with the overall sum. This detailed analysis helps healthcare providers make informed decisions regarding the diagnosis and management of vitamin D-related conditions.