This test measures the ability of two sugar molecules, lactulose and mannitol, to permeate the intestinal epithelial barrier. Ordinarily, mannitol is efficiently absorbed but lactulose, a larger molecule, is not. This test can help to identify malabsorption and "leaky gut" syndrome (abnormal intestinal permeability), which is often associated with inflammation specifically in the gastrointestinal tract. This test requires a baseline urine collection followed by a six-hour timed urine collection after ingesting a lactulose and mannitol solution.
5 to 7 days
Click any analyte name for additional clinical information, including reference ranges, specimen collection, stability and rejection criteria.
List price applies when filing with insurance or Medicare, or when billing a patient directly.
Prompt payment pricing applies when billing to a physician account or prepayment is received with the test.
Doctor's Data offers profiles containing multiple analytes. *Multiple analytes may be billed under a single CPT code. Many analytes can be ordered individually. Pricing may vary. Click on a specific analyte for more information or read our detailed billing and payment policies.
The CPT codes listed on our website are for informational purposes only. This information is our interpretation of CPT coding requirements and may not necessarily be correct. You are advised to consult the CPT Coding Manual published by the American Medical Association. Doctor's Data, Inc. takes no responsibility for billing errors due to your use of any CPT information from our website.