CPT® Code 83593

1. Indications

The 17-ketosteroid (17-KS) test is indicated for the evaluation of various endocrine disorders and conditions that may affect adrenal hormone production. The following are specific indications for performing this laboratory test:

• Adrenal Hyperplasia - This condition can lead to elevated levels of 17-KS, particularly in cases associated with precocious puberty.
• Cushing Syndrome - Patients with this syndrome may exhibit increased levels of 17-KS due to excessive cortisol production.
• Obesity - Elevated 17-KS levels may be observed in individuals with obesity, indicating potential adrenal dysfunction.
• Pathological Stress Conditions - Situations such as acute illness, infection, surgery, and burns can lead to increased production of 17-KS as a response to stress.
• Addison's Disease - This condition may result in decreased levels of 17-KS, indicating adrenal insufficiency.
• ACTH Deficiency - A deficiency in adrenocorticotropic hormone can lead to lower levels of 17-KS.
• Hypopituitarism - This condition may also result in decreased production of 17-KS due to insufficient hormone signaling from the pituitary gland.

2. Procedure

The procedure for measuring 17-ketosteroids (17-KS) involves several key steps to ensure accurate results. The first step is the collection of a 24-hour urine sample from the patient. This comprehensive collection period is crucial as it allows for the measurement of the total amount of 17-KS excreted in urine over a full day, providing a more reliable assessment of adrenal function. Once the urine sample is collected, it is sent to a laboratory for analysis. The laboratory utilizes quantitative spectrophotometry, a method that measures the concentration of substances in a solution based on the absorption of light at specific wavelengths. This technique is particularly effective for analyzing steroid hormones, including 17-KS. The results of the test will indicate the levels of 17-ketosteroids present in the urine, which can then be interpreted in the context of the patient's clinical condition and symptoms.

3. Post-Procedure

After the 24-hour urine collection and subsequent analysis, the results will be reviewed by the healthcare provider. Depending on the findings, further diagnostic testing or treatment may be recommended. If elevated levels of 17-KS are detected, additional evaluations may be necessary to determine the underlying cause, such as imaging studies or hormone level assessments. Conversely, if levels are low, the provider may consider further testing to assess for conditions like Addison's disease or other forms of adrenal insufficiency. Patients are typically advised to follow up with their healthcare provider to discuss the results and any necessary next steps in their care plan.