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The CPT® Code 83670 refers to the measurement of leucine aminopeptidase (LAP) levels through a blood test. LAP is an enzyme that plays a crucial role in the maintenance of cells and is primarily found in the liver and small intestine. This enzyme is involved in various metabolic processes, and its levels in the blood can provide valuable insights into liver function and overall health. Elevated levels of LAP may suggest liver damage or dysfunction, which can arise from several conditions, including hepatitis, cirrhosis, and tumors. It is important to note that elevated LAP levels can also be a normal physiological finding during the third trimester of pregnancy, indicating that context is essential when interpreting test results. The test is performed by obtaining a blood sample through venipuncture, which is a procedure that may need to be reported separately. The serum obtained from the blood sample is then analyzed using quantitative spectrophotometry, a method that measures the concentration of the enzyme in the serum, providing precise and reliable results for clinical assessment.
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The leucine aminopeptidase (LAP) test is indicated for various clinical scenarios where liver function assessment is necessary. The following conditions may warrant the performance of this test:
The procedure for measuring leucine aminopeptidase (LAP) levels involves several key steps to ensure accurate results. First, a qualified healthcare professional will perform venipuncture to obtain a blood sample from the patient. This involves inserting a needle into a vein, typically in the arm, to draw blood into a collection tube. It is important that this step is performed with proper aseptic technique to minimize the risk of infection. Once the blood sample is collected, it is processed to separate the serum from the cellular components. The serum is then subjected to quantitative spectrophotometry, a laboratory technique that measures the concentration of LAP in the serum. This method involves passing light through the serum sample and measuring the absorbance at specific wavelengths, which correlates with the enzyme's concentration. The results are then analyzed and reported, providing critical information regarding the patient's liver function and potential underlying conditions.
After the blood sample has been collected and processed, there are generally no specific post-procedure care requirements for the patient. However, it is advisable for patients to remain hydrated and to follow any additional instructions provided by their healthcare provider. The results of the LAP test will typically be reviewed in conjunction with other liver function tests and clinical findings to provide a comprehensive assessment of liver health. Patients may be advised to discuss the results with their healthcare provider to understand the implications and any necessary follow-up actions based on the findings.
| Short Descr | ASSAY OF LAP ENZYME | Medium Descr | LEUCINE AMINOPEPTIDASE LAP | Long Descr | Leucine aminopeptidase (LAP) | Status Code | Statutory Exclusion (from MPFS, may be paid under other methodologies) | Global Days | XXX - Global Concept Does Not Apply | PC/TC Indicator (26, TC) | 9 - Not Applicable | Multiple Procedures (51) | 9 - Concept does not apply. | Bilateral Surgery (50) | 9 - Concept does not apply. | Physician Supervisions | 09 - Concept does not apply. | Assistant Surgeon (80, 82) | 9 - Concept does not apply. | Co-Surgeons (62) | 9 - Concept does not apply. | Team Surgery (66) | 9 - Concept does not apply. | Diagnostic Imaging Family | 99 - Concept Does Not Apply | CLIA Waived (QW) | No | APC Status Indicator | Conditionally packaged laboratory tests | Type of Service (TOS) | 5 - Diagnostic Laboratory | Berenson-Eggers TOS (BETOS) | T1H - Lab tests - other (non-Medicare fee schedule) | MUE | 1 | CCS Clinical Classification | 233 - Laboratory - Chemistry and Hematology |
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| Pre-1990 | Added | Code added. |
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